Bolster Armouries ONYX SBR [Violet Edition] Advanced M4 AEG

Bolster Armouries
Code: BA-ONYX-S-R4
  • Bolster Armouries ONYX Gen.4
  • Gate TITAN MOSFET & Warhead CNC Black Motor
  • Hand assembled and tuned to perfection

Introducing the Bolster Armouries ONYX SBR [Violet Edition], the latest iteration of the Bolster Armouries ONYX platform. The Violet Edition is the end result of decades of tech experience and 2 full years of user feedback and field testing of the original ONYX, ONYX [Forged Edtion] and ONYX [EON Edtion] and is kitted out with the best combination of parts discovered through the extensive Bolster Armouries R&D process.

Starting with the Krytac Barrett REC7 DI SBR AEG in Tungston and treating it to a hint of stylish contrast in the form of a Northern Lights Cerakote finish on the barrel, buffer tube and bolt carrier, the [Violet Edition] carries through the best of the original Bolster aesthetic with exciting new additions in the form of its unique Gate NOVA CNC trigger and EON HOP-up unit finished in Bolster Armouries Violet.

As is the standard set by Bolster Armouries, almost none of the Krytac internal parts remain; everything found to be lacking has been removed and replaced with the very best aftermarket upgrades from Laylax Prometheus, Warhead Industries, Maple Leaf, FPS Soltair, Gate Electronics and other big names in the high-end Airsoft aftermarket.

While sourcing the right upgrade parts is one thing; installation, fine-tuning and R&D is a different story. With Bolster Armouries, you can shoot with confidence, knowing your primary was assembled and tuned by talented techs who take pride in their work and simply will not let anything less than perfection leave the workbench.

Affirming the team’s confidence in its builds, the Bolster Armouries Dedicated After-Sales Service Programme supplied with each Bolster AEG has you covered for 24 months from the date of purchase, meaning the unparalleled performance of the ONYX SBR [Violet Edition] when you let off that first glorious burst will be maintained in the long term.

Full description


Your Bolster Armouries ONYX will require regular routine maintenance. See our Bolster Armouries Maintenance Guide for more information.

Bolster Armouries was founded with one primary mission: To provide Airsofters with a range of RIFs which has been fine-tuned to provide the absolute peak in attainable performance together with breath-taking external quality. Each of our replicas is hand-assembled by some of the most experienced Airsoft gun techs in the industry and is built to an exacting standard.

Conceived with the modern Airsofter in mind, Bolster Armouries RIFs sport some of the finest internal and external upgrades available on the Airsoft market today and are guaranteed to provide unparalleled performance. To underline their dedication to their products, every Bolster Armouries RIF is issued with a dedicated extended warranty and service package, ensuring you get the complete experience the creators intended.

The ONYX SBR [Violet Edition] is the latest evolution of the Bolster Armouries ONYX platform, intended for those who prefer a short-barreled rifle and want a fully upgraded platform which can outshoot almost anything else out there. The [Violet Edition] boasts the original Bolster Armouries ONYX aesthetic with the distinctive new Bolster Armouries Violet finish on the trigger, HOP-up unit, cylinder head and piston head, subtly signalling its upgraded internals with parts made specifically for Bolster Armouries and not available separately.

As with previous ONYX platform releases, the [Violet Edition] is built with the finest aftermarket parts in the business, with the Krytac Barrett REC7 DI SBR serving as the base platform. Only the external shell, gearbox shell and gears themselves remain; everything else has been stripped away and replaced with proven aftermarket parts assembled with the utmost care by some of the most talented techs in the industry.

All the biggest names, from Laylax Prometheus to Warhead Industries and FPS Softair feature inside and all parts are tuned to perfection, with the Gate TITAN V2 with its newest “Expert” firmware acting as the brain of the platform. Adding to its box of tricks, the TITAN now communicates directly with the ESC module on the Warhead Industries CNC Black Brushless Motor, meaning the Bolster bar is raised further still when it comes to electrical efficiency and rate of fire.

New additions to the Bolster Armouries formula are the EON HOP-up unit, NOVA CNC Trigger and Protector Piston Head from Gate Electronics, finished in Bolster Armouries custom violet anodisation. The “off the shelf” version of these parts previously featured in the ONYX [EON Edition] and performed phenomenally, leading the Bolster tech team to commission these gorgeous CNC aluminium parts with a custom finish, specifically made for Bolster Armouries builds and not available on their own.

Not content with simply tricking out the internals, choice real steel and Airsoft parts have been added on the outside of the ONYX SBR [Violet Edition] in true Bolster Armouries tradition. Up front, the team fitted a PTS Syndicate Griffin Armament M4SD-K suppressor to allow ONYX users to switch quickly between a suppressed and unsuppressed configuration while rocking gorgeous Griffin Armament trademarks and an inimitable grid pattern fluted surface design.

Mounted to the M-LOK handguard, the [Violet Edition] is fitted with the old Bolster favourite, the PTS Syndicate Fortis Shift Grip, a highly adaptable M-LOK mounted grip which can be used in several different ways. The Fortis Shift grip is constructed from CNC 6061-T6 aluminium and has a stylish, skeletonised design which suits the ONYX perfectly.

Widely regarded as the best AR-15 carbine stock available for the vast majority of applications, the legendary Magpul CTR Stock features at the rear, giving you a real steel rifle stock that is practically without equal. The CTR is made in the USA using Magpul’s advanced high density polymer, features the Magpul “Friction Lock” system to eliminate wobble and is fitted with a rubber butt plate for optimal gripping qualities in any weather conditions.

If the mass-produced guns from other manufacturers are the equivalent of a Ford, a Bolster Armouries AEG is a Rolls Royce; crafted with care, to perfection, with the highest quality parts available and a distinctive external look leaving onlookers in no doubt that this is a Bolster Armouries AEG.

Bolster Armouries ONYX SBR [Violet Edition] Advanced M4 AEG

As with previous ONYX platform releases, the base platform for the ONYX SBR [Violet Edition] is the Krytac Barrett REC7 AEG, widely regarded as having some of the highest quality core external parts available. The only external parts retained from the original REC7 are the outer barrel, receiver, buffer tube, and handguard; everything else has been stripped out to make room for the Bolster Armouries' internal and external style up.

The REC7 parts in the ONYX [Violet Edition] build are constructed from Aluminium and finished with a CNC machining process, resulting in immaculate details and a flawless form. The handguard features a monolithic style 20mm Picatinny rail which meets the receiver rail seamlessly, providing an uninterrupted attachment surface suited for practically any optical sight setup, including combinations of Holographic sights with magnifiers or night vision monoculars.

The REC7 handguard uses the M-LOK negative space attachment interface to keep the weight of the ONYX down to only what is necessary while offering the option to add any M-LOK compatible accessories, from vertical grips to bipods and more. The 9.5-inch handguard has an octagonal profile and provides M-LOK at the 3, 6, and 9 o'clock positions with Picatinny rail along the top.

The smooth edges of the handguard make it a pleasure to hold, unlike many other metallic handguards which require rail covers for comfort. The REC7 handguard was chosen by the Bolster Armouries team for this reason. Having a handguard which requires no additional rail covers or grips to provide a comfortable hold means you can keep the ONYX in its bare-bones configuration if you prefer a simple setup, or deck it out to the nines if the mission requires it.

The REC7 receiver retains the beautiful, authentic, and fully licensed Barrett Firearms trademarks on the left side of the magazine well, reading; BARRETT | FIREARMS MFG INC | MURFREESBORO, TN | REC7 | CAL. MULTI. These markings are precisely engraved and add a touch of realism to the ONYX, with a nod to one of the most well known firearms manufacturers out there.

The ONYX SBR is a perfect replica of the real Barrett REC7, down to every protrusion, surface angle and finish, as one would expect when using a Barrett-licensed AEG shell manufactured by Krytac. The receiver matches the form of a standard AR-15 receiver, with its mock ejection port positioned on the right side of the upper receiver, followed by a mock brass defector and mock forward assist. The right side of the upper receiver features a standard-shaped AR-15 cam pin protrusion, perfectly matching that of the real Barrett REC 7.

The lower receiver is where you will find the controls of the ONYX SBR [Violet Edition], with the fire selector being located just above the pistol grip in a very accessible location; one of the traits the AR-15 platform is known and loved for. The selector switch provides 3 positions; Safe, Semi-automatic, and fully automatic with a 90-degree throw between each mode and is mirrored on either side to allow left and right-handed shooters to operate this essential control intuitively. Each selector position is denoted with an engraved pictogram, following trends in modern firearms development and imitating real Barrett REC7 perfectly.

The magazine release can be found on the right side of the ONYX, on the magazine well, and is protected from accidental drops with a magazine release fence machined as part of the lower receiver. The mag release lies well within reach of the trigger finger of a right-handed user and can be used by left-handed shooters by pressing the release with the support hand thumb. This magazine release is a "drop-free" design, granting additional speed when time is of the essence; whether you are skirmishing or shooting against the clock!

CERAKOTE Finish - Northern Lights

Cerakote is an advanced, hard-wearing, and corrosion-resistant ceramic coating developed for industries ranging from automotive to firearms and aerospace applications. Cerakote is offered in a wide range of finishes and is generally considered to be superior to anodizing when it comes to providing a custom finish to firearms. This is due in part to the high standards of colour consistency with a Cerakote finish, and that as a part of the process, anodizing creates a brittle and porous oxide layer over the parts, increasing tensile residual stress which can cause the finish to crack.

Cerakote does not affect the fatigue properties of aluminium and its alloys, making it ideal for Bolster Armouries RIFs. Cerakote has been extensively tested and has shown to be capable of exceeding military standards for corrosion resistance by over 40 times when subjected to a salt chamber test, even outlasting the commonly used Nitride finish for the barrels of real rifles.

The Cerakote "Northern Lights" finish is a stunning colour-changing navy blue which transforms into a greenish teal with glistening gold metallics when tilted, providing an extremely eye-catching finish and an absolutely distinctive overall look. This coating has been applied to the outer barrel, buffer tube and mock bolt carrier of the ONYX SBR [Violet Edition], providing a subtle contrast with the Tungsten finish and highlighting the platform’s nature as a unique customised Airsoft gun. Northern Lights is also a near-perfect match for the cyan adjustment dial of the Gate EON HOP-up unit, tying the styling of the [Violet Edition] together for a complete look.

Northern Lights is a part of the Cerakote H series of coatings, which boast excellent wear resistance, chemical and solvent resistance, and superb adhesion. The Northern Lights finish is visible through the ports on the handguard, through the mock ejection port and the draining holes on the Magpul CTR stock, leaving observers in no doubt that this is a Bolster Armouries custom piece.

PTS Syndicate Ergonomic Enhancements

The Bolster Armouries ONYX SBR [Violet Edition] has been equipped with a host of PTS Syndicate ergonomic enhancements to ensure it handles as well as it shoots.

The pistol grip has been replaced with the advanced EPG Pistol grip, offering a highly supportive design with a curved extension to help you maintain a comfortable hold and protect the web of your hand whilst manipulating the ONYX [Violet Edition]. This Pistol grip is constructed from Dupont Zytel, a high strength, abrasion and impact-resistant thermoplastic polyamide/nylon, aka, the best of the best when it comes to high density polymer.

With comfortable dot texturing on either side and crackle texture on the front strap and backstrap, this grip is the perfect enhancement to ensure an ONYX-wielding player maintains a positive grip on the rifle in any weather condition, even while wearing thick gloves. The EPG follows a very similar profile to the popular Magpul MIAD and MOE grips for real AR-15s, both of which have an excellent reputation for providing a comfortable grip which suits a wide variety of hand shapes and sizes.

This pistol grip is paired with a PTS Syndicate Fortis Shift Grip, a recently designed grip intending to provide the functionality of both a vertical foregrip and an angled foregrip. The Fortis Shift Grip is machined from a single piece of billet 6061-T6 aluminium and is a skeletonised design weighing in at a minuscule 104g whilst availing itself of all the structural advantages of aluminium construction.

The Fortis Shift can be used either with a traditional vertical grip hold, the more modern thumb-break or thumb overbore (also known as "C clamp") grip, or even as a hand stop while retaining the flexibility to switch between grip methods when shooting from unconventional positions in a dynamic skirmishing environment.

The ONYX platform has been equipped with a PTS Radian Raptor-LT charging handle, the latest iteration of the revolutionary Radian Weapons ambidextrous charging handle, now adapted for Airsoft use by PTS Syndicate. The Raptor charging handle allows easy access for both left and right-handed users due to its dual-wing design and functions identically from either side of the rifle.

The Raptor is comprised of a 6000 series aluminium skeleton with a black anodized finish which is over-moulded with PTS' own custom reinforced polymer formula; known for its combination of high strength, low weight, and impressive durability.

The design of the Raptor charging handle allows it to be pulled with a single finger, thumb, or even the palm of your hand due to its serrated grip surfaces on the charging handle "wings" providing positive grip in any situation.

The right side "wing" of the Raptor is slightly longer than the left side in order to clear the mock forward assist button found on the ONYX, allowing smooth operation with no snags for a left-handed user, or a right-hander who uses shoulder-to-shoulder transitions to gain the edge in close quarters. Pulling the charging handle to the rear provides access to the Gate EON CNC aluminium rotary HOP-up unit which is accessible through the mock ejection port on the right side of the ONYX SBR [Violet Edition].

PTS Griffin M4SD-K Suppressor & PTS Griffin M4SD Flashcomp

To match the modern design aesthetic of the Barrett REC7 body and M-LOK handguard, the PTS Griffin M4SD Flashcomp was chosen as the muzzle device for the Onyx platform, accompanied by the quick detachable PTS Griffin M4SD-K suppressor. The Flashcomp is a hybrid compensator-flash hider design, with a 3 port "birdcage" and a tri-prong configuration at the tip.

The Griffin Armament Flashcomp is the icing on the cake, completing the sleek, yet aggressive design of the Onyx rifle. The Flashcomp features weight-reducing cuts at the tip in each of the three prongs, and an attractive Griffin Armament logo which is flawlessly laser engraved in the centre of the muzzle device.

At the base of the Flashcomp, we can see a familiar looking collar design, matching that of a standard M16A2/M4A1 birdcage flash hider. This section allows the PTS Griffin Armament M4SD-K and many other suppressors with a QD locking mechanism designed for "A2" birdcage compatibility to be added when necessary and removed in seconds.

The M4SD-K suppressor not only ties in with the Bolster Armouries Onyx look but provides the perfect combination of low weight and durability with its machined aluminium fluted surface design. This design was inspired by the fluted barrels present on precision rifles, requiring a heavy barrel profile and significant structural rigidity in concert with reduced weight for improved handling. This fluting takes the form of a grid pattern design and marks out the Griffin Armament M4SD-K from the vast majority of other suppressors with their smooth-sided cylindrical profile.

The M4SD-K suppressor uses the proven Griffin Armament SDQD mounting interface which is widely regarded as one of the fastest and most secure mounting interfaces on the suppressor market, following testing of the real M4SD-K in Afghanistan during Operation Enduring Freedom. With an overall length of just 5.75 inches, the M4SD-K adds very little additional length to the Onyx platform, and its fluted aluminium construction maintains the elegant balance of the rifle by adding minimal extra weight.

Genuine Magpul CTR Stock

The Magpul CTR stock is widely regarded as the best AR-15 carbine stock available for the vast majority of applications and is designed to be used with AR-15 rifles with a mil-spec buffer tube. This stock has been seen in use with US Army Special Forces, US Navy SEALS, and our own UKSF, the special forces directorate comprising the SAS, SBS, SRR, and SFSG (1 PARA).

The CTR is an "A-frame" design, intended to keep the weight of the stock to a minimum whilst retaining optimal strength. The adjustment latch of the CTR is concealed within the A-frame design, avoiding snagging on slings or other equipment, and keeping the latch shielded from inadvertent activation. A premium chrome-silicone lock spring is used in the adjustment mechanism to provide dependable locking and long life.

The top of the stock has a sloping profile to provide a comfortable cheek weld whilst retaining a slim footprint. The sling mounting options provided on the CTR stock include; a QD sling socket on either side (accommodates up to 1.5" swivels), 1.25" sling loops on the bottom of the A-frame and at the rear, and a lanyard hole at the toe of the stock which is perfect for custom paracord sling solutions.

The CTR also features a "friction lock" system, intended to eliminate any wobble between the stock and buffer tube for enhanced weapon stability and a premium feel. The adjustment latch includes moulded in linear texturing to ensure that when you need to make an adjustment, there is no chance of slipping off the latch. The friction lock can be found on the bottom of the stock, at the front, and will pop open when the adjustment latch is pressed. After selecting your adjustment, simply squeeze the friction lock closed to eradicate any movement in the stock.

To ensure the stock stays firmly in your shoulder the CTR includes a removable 0.3" rubber butt pad with an anti-slip surface which also serves to increase impact protection in case the rifle is dropped on the stock. This stock has been copied by a plethora of Chinese factories, but the copies are known for their, to put it mildly, "approximate" tolerances, and have been the cause of many facial injuries when used on real rifles. The use of a genuine Magpul CTR on the ONYX [Violet Edition] affords it the best stock money can buy, with the advanced design and inherent strength of Magpul's advanced high density polymer.

Internal Enhancements

The internal parts present in the Bolster Armouries ONYX are hand-selected for the high quality materials used in their construction, as well as for their exceptional performance. Each Bolster Armouries Gearbox is hand-built, with each gear being perfectly shimmed for smooth operation, and the piston position also being corrected for the perfect Angle of engagement (AOE) to provide maximum efficiency and longevity.

This gearbox is matched with one of the most well-regarded steel tightbore inner barrels out there, renowned for its rigidity and high quality internal finish. This is paired with the latest and greatest  CNC HOP-up unit to hit the market, the Gate EON rotary HOP-up unit and a Prometheus Purple HOP-up rubber, based on the original Marui design but comprised of longer lasting materials. Let's have a closer look at what goes into an ONYX [Violet Edition] AEG, and why these parts are so noteworthy:

Prometheus 6.03mm EG Inner Barrel - Stainless Steel

Improves accuracy - Enhanced Air seal - Click for more info

The Prometheus 6.03mm EG inner barrel is constructed from SUS 304 stainless steel (also known as SS304 or AISI304), with a chromium content of between 18% and 20% and nickel content between 8% and 10.5%. This choice of material not only gives the inner barrel exceptional rigidity, but has higher corrosion resistance than other stainless steels, aluminium, or brass used in other inner barrels.

This inner barrel was chosen primarily for its reputation as one of the best AEG upgrades money can buy, but also its precise dimensional tolerances which are guaranteed to be within 1/100th of a millimetre of the manufacturer's specs. This means we can confidently say your Bolster Arms AEG will shoot straight and true, as long as you do your part! This part also serves as a great way to increase the FPS of an AEG by a small amount without adding additional strain to the gearbox, simply by using the compressed air provided by the piston more efficiently.

Prometheus Purple HOP-up Rubber - Soft Rubber

Wear resistant -  Improved HOP-up effect - Click for more info

The Prometheus Purple HOP-up Rubber is based on the original and proven Tokyo Marui HOP-up rubber design but is cast in a far more wear resistant rubber whilst maintaining the prerequisite softness necessary for a strong HOP effect.

This HOP-up rubber has become a household name in Airsoft, next to the Guarder Clear, but the Prommy Purple has, in recent years become the HOP-up bucking of choice for those attempting a Flat HOP modification. This mod intends to increase the effect of the HOP-up by widening the area of contact with the BB and is generally home-brewed and can have wildly varying results, often requiring extensive testing and troubleshooting. This brings us seamlessly on to our next part...

Maple Leaf Delayer OMEGA Nub - Hard Rubber

Wide contact surface - Stronger HOP-up effect - Click for more info

The Maple Leaf OMEGA HOP-up nub is intended to be a mass-produced alternative to the home-brewed R-HOP and flat HOP modifications of yesteryear. This provides the kind of performance you would expect from a very well made flat HOP modification, but with no chance of potential jams and considerably less likelihood of failure due to its single piece design.

The OMEGA nub has a concave contact surface, shaped to match that of a 6mm BB perfectly, providing HOP effect across the entire upper surface of the BB, instead of just a single point in the centre. This provides excellent side-to-side stability and an increased HOP effect, extending the range of the AEG into the borderline implausible!

Gate EON CNC HOP-up Chamber - CNC Machined Aluminium - Bolster Armouries Custom Violet/Cyan Adjuster Dial

Fine adjustments possible - Enhanced air seal - Click for more info

The Gate EON CNC HOP-up chamber and its rotary adjuster are constructed from CNC machined aluminium and the HOP-up arm, redesigned C-clip, and barrel spacer are made from CNC machined POM polymer to provide the precise tolerances necessary for optimal air seal and consistency down range. When put to the test, the Bolster Armouries tech team found that this unit is easily the equal of the Pro-Win HOP-up unit, their former favourite, but with a fresh new look and some thoughtful enhancements.

Gate’s innovative EON CNC HOP-up unit boasts several refinements even Pro-Win didn’t think of! The new C-clip has a protrusion in the bottom which interfaces with the indexing groove on AEG inner barrels to prevent rotation from compromising accuracy, the feed chute features an O-ring to prevent BBs from falling out when the magazine is removed and the adjuster/dial is now numerically marked so you can keep track of your HOP-up settings for different ammo weights and save setup time!

As with the other Gate CNC parts in both the ONYX Blackout and the ONYX [Violet Edition], the EON HOP-up unit is finished in the striking Bolster Armouries custom metallic violet, with an adjuster finished in Cyan to match the Northern Lights Cerakote finish. This allows you to pull back the PTS Raptor charging handle to "pop the hood", showcasing the unique finish applied to this superb HOP-up unit which simply cannot be bought separately, marking your ONYX out as a truly unique custom build.

FPS Softair CNC Delrin® Polymer Air Nozzle with Inner O-Ring - CNC Delrin® & Rubber

Low friction design - Internal O-ring for improved efficiency - Click for more info

The FPS Softair CNC Delrin® Polymer Air Nozzle is constructed from CNC machined Delrin®, a high strength, low friction acetal homopolymer designed for high load mechanical applications and often used as a replacement for metal in doors, conveyors, zip fasters and medical delivery devices.

Representing the first use of this type of polymer for Airsoft applications (as far as we know), FPS Softair is ever the innovator, always looking for better ways to do things with the foundation of its engineering prowess.

Being CNC-finished, this nozzle has incredibly tight tolerances, a low friction finish and unbeatable strength when it comes to polymer air nozzles. Its inner O-ring only adds to its effectiveness, positively eliminating air leaks for maximum consistency, translating into pinpoint accuracy downrange.

The perfect pairing for the FPS Softair Carbon Fibre Reinforced Tappet Plate, the CNC Delrin Polymer Air Nozzle has a plethora of benefits over stronger but heavier aluminium nozzles. Being polymer, the nozzle has almost no chance of damaging the Gate EON HOP-up unit over time and puts minimal stress on the tappet plate thanks to its low weight.

An equivalent aluminium nozzle could destroy even the best HOP-up units on the market should the nozzle become misaligned, which is entirely possible due to the extra stress placed on the tappet plate by the heavier aluminium part.

FPS Softair’s inventive use of Delrin® Polymer provides ample strength for long term durability without causing other parts to take excess wear, making it perfect for Bolster Armouries’ objective of providing a fully upgraded AEG at the absolute pinnacle of performance with the robust and considerate design intended to continue to perform in the long term.

FPS Softair STEEL CYLINDER TYPE “C” - CNC Machined Steel

Bolster Armouries EZO Bearings - Heat Treated Japanese Steel

Ultra low friction - Extremely strong  - Click for more info

Bolster Armouries EZO Ball-Bearing Bushings are designed and manufactured by Sapparo Precision Inc. in Japan and have been chosen by the Bolster team thanks to their extremely low friction, high-quality steel construction and fantastic reputation in a wide range of industries.

Specialists in medium and miniature ball bearings, Sapporo Precision bearings have a wide range of applications; in this case, reducing friction and extending the lifespan of the finely tuned Bolster Armouries ONYX. These bearings allow the  gears to spin freely at the tremendous rate provided by the Warhead Brushless Motor with minimal chances of failure, all while reducing stress on the gearbox shell and gear axles.

Gate Protector Cylinder head - CNC Machined Aluminium - Bolster Armouries Custom Violet

Corrects angle of engagement - Perfect air seal - Click for more info

The Gate Protector CNC aluminium cylinder head is constructed from CNC machined aircraft grade aluminium to an extremely high degree of precision. The Protector is designed to ensure the nozzle aligns perfectly with the nozzle guide on the cylinder head itself to prevent feeding and FPS fluctuation issues due to what is known as “mid-cap syndrome”.

The Protector is also fitted with a shock-absorbing rubber bumper which functions the same way as the AirLab Sorbothane pad used in previous Bolster builds, reducing wear and stress on the gearbox shell and limiting wear on the piston head. To ensure we get the air seal qualities we should with a precise CNC machined part, the Protector also has a dual O-ring configuration around its circumference to completely close the gap between the cylinder and cylinder head.

The Protector variant used in the ONYX Blackout and ONYX [Violet Edition] is finished in Bolster’s unique metallic violet which is unfortunately not visible from the outside. What a shame! Nonetheless, the metallic violet colouration of this part is your certificate of authenticity as this finish is a Bolster Armouries exclusive and not available separately.

Gate Power CNC Aluminium Hybrid Piston Head - CNC Machined Aluminium - Bolster Armouries Custom Violet

Enhanced compression -  Improved shot-to-shot consistency - Click for more info

As with the ‘Protector’ cylinder head, the Gate Power Hybrid Piston Head is constructed from aircraft-grade aluminium using CNC machining technology to provide the tight tolerances necessary for a perfect fit between the cylinder walls and piston head and flawless air seal qualities. The Power Piston Head is also finished in Bolster Armouries' unique metallic violet, though it is hidden from sight inside the gearbox shell.

The Power piston head features a pair of O-rings to completely seal any gap between the cylinder and the piston head itself, completely eliminating air leaks to ensure that all the compressed air generated by the gearbox is translated into effect downrange.

Supplied with an AOE correcting spacer as well as special weight pads which allow for tuning for optimal performance with various weights of ammo, as you will receive it, the Power piston head is configured perfectly for the ONYX internal setup and the G&G Armament 0.28g BBs the Bolster Armouries team recommend.

Gate NOVA CNC Aluminium Enhanced Trigger 2B1 - CNC Machined Aluminium - Bolster Armouries Custom Violet

Adjustable trigger travel -  Ultra-responsive trigger - Click for more info

The Gate NOVA CNC aluminium trigger allows for adjustable pre-travel and over-travel via two grub screws, one in the trigger body to adjust pre-travel, and one in the rear extension to adjust over-travel.

Designed to mimic competition-optimised real steel AR-15s, the trigger adjustment allows you to tune the NOVA to suit your requirements and is a popular upgrade for those who want the absolute fastest rate of semi-auto fire. An adjustable trigger is a formidable addition for those who require rapid semi-auto and victory through volume of fire; a true asset to the build objectives of the ONYX.

The front face of the chosen variant, the “2B1” is smooth but has bevelled edges which keep things comfortable when rapid firing by removing "hot spots" which may cause discomfort over long durations. We expect you will be using this part quite a lot, and the 2B1 style was chosen as the best option both for rapid semi-auto double taps and finger fatigue-free full auto mayhem should you decide to stretch the ONYX's legs outdoors!

Finished in Bolster Armouries’ custom metallic violet, this variant of the NOVA CNC trigger is not available separately, giving the ONYX SBR [Violet Edition] a custom touch not found on anything other than a Bolster Armouries custom build.

SHS Purple 15-Tooth Piston - Reinforced Polymer with Carbon Steel teeth

Low weight improves cyclic rate - High strength teeth - Click for more info

The SHS purple piston is comprised of two parts, combined to provide the best compromise between keeping the weight low, and the rigidity high. The piston body is constructed from fibre reinforced polymer, providing ample strength to resist the strain from rapid cycling whilst keeping the weight to a minimum.

The piston teeth which mesh with the steel sector gear are constructed from high carbon steel to provide the rigidity required for long term use alongside steel gears revolving at an incredible rate under spring tension. Despite its full steel tooth rack, the SHS piston weighs a mere 34g, keeping it well within the design parameters of the upgraded ONYX gearbox.

Bolster Armouries M115 Spring - Ferrosilicochrome with Zinc coating

Reduces strain on the gearbox internals - Corrosion Resistant - Click for more info

The Bolster Armouries M115 spring is constructed from SiCr Alloy (also known as Ferrosilicochrome), with a zinc coating to discourage corrosion. This Alloy is well known for its use in manufacturing springs for the automotive industry and many others requiring static torsion loaded springs with high corrosion resistance.

The spring is a non-linear design, reducing strain on the gearbox by varying the coil tension over the course of compressing the spring. This means the spring design takes advantage of the points in the cycle of the AEG where the piston is in the best position to handle the high strain, such as the midpoint, whilst reducing the initial load on the piston teeth.

This M115 spring has closed and flattened ends which reduce wear on the piston, and minimize the chance of it failing. The Bolster Team had these springs made this way in order to reduce the strain on the internal components in the high speed ONYX gearbox whilst providing the necessary velocity, and its design which provides optimal performance with a 6.03mm tightbore inner barrel.

Prometheus Krytac Spur Gear Spacer - CNC Machined Aluminium

Ensures a perfect shim job - Reduced internal wear  - Click for more info

The original Krytac steel gearset is equipped with self-shimming spring spacers on its spur gear, which reduces the need for complex and long winded shimming by attempting a "one size fits all" solution. This can be great for amateurs who want to upgrade their gearbox, as it removes the need to carry out the shimming process, which is one of the more difficult aspects of building a smooth running gearbox.

There are no amateurs at Bolster Armouries, and the main issue the Bolster team identified with this system is that whilst preferable to a bad shim job, the self-shimming spring spacers can cause additional rotational stress resulting in an increase in gear and motor noise, and long term wear.

The spring spacer originally inside the Bolster Armouries ONYX has been removed from the spur gear, replaced with the Prometheus CNC machined aluminium alloy spacer, and shimmed to a professional level to provide an exceptionally smooth running gearbox, with reduced friction, minimal noise from the gears, and a motor running smoothly without any additional stress caused by sub-optimal meshing and horizontal movement of the gears.

Prometheus EG Hard Bevel Gear - Heat Treated Japanese Steel

Improved Longevity - Reduced ARL Load - Click for more info

Strong gears are the core of any high performance Airsoft build, and while the ONYX retains most of the original Krytac hardened steel gears which are superb, the Bolster Team decided they could do better. Constructed from steel hardened using precision shot peening, the Prometheus EG Hard Bevel Gear is widely known as the strongest bevel gear on the market, and comes with the Prometheus pedigree.

The precision shot peening process essentially compresses the surface of the part and delays the formation of cracks and fractures by repeatedly shooting a spherical projectile at the object to be peened using compressed air and is a commonly used technique in the manufacture of military vehicles and aircraft to prevent fatigue cracks from developing in these high-stress applications. Shot peening also helps prevent corrosion and adds wear resistance, and this is especially useful on a bevel gear as it is this gear which meshes with the motor and anti reversal latch and is most likely to come under sudden high strain.

FPS Softair Carbon Fibre Reinforced Tappet Plate - Carbon Fibre-reinforced High-density Polymer

Highly Durable - Perfect Nozzle Alignment - Click for more info

The FPS Softair Carbon Fibre reinforced tappet plate is a new part featuring in Bolster Armouries builds, chosen based on the superb quality and high performance bar set by other FPS parts. Ideal for a precise build which requires perfect nozzle alignment, the tappet plate is constructed from carbon fibre reinforced nylon polymer which has the perfect amount of rigidity and flex without being vulnerable to sudden fractures under heavy load as a conventional polycarbonate tappet might.

The tappet plate is an essential part when it comes to ensuring the AEG's internals are timed correctly and that feeding is smooth and constant. The FPS Tappet has an absolutely flawless shape, the perfect amount of strength while avoiding being so hard it becomes brittle, and its carbon fibre reinforced polymer gives it the edge in durability over every other tappet on the market; perfect for a real beast of an AEG like the ONYX.

Gate TITAN MOSFET V2 USB link Expert Firmware

Improves efficiency - Provides pre-cocking function - Protects circuitry

Gate Electronics is well known amongst Airsofters for providing some of the best MOSFETs the Airsoft industry has to offer. These include the basic X-ASR which provides battery protection, the ASTER which adds GATE Control station App functionality, and the Gate's flagship option, the TITAN. The TITAN takes the already well equipped Bolster Armouries ONYX and transforms it from an extremely well tuned AEG into the realms of an advanced training weapon.

The TITAN provides a plethora of functions, including trigger travel adjustment, pre-cocking, Burst mode, Binary trigger, and adaptive active braking. A total of 8 optical sensors within the TITAN are used to track the movement of the gears, piston, and trigger to ensure the gears complete a full cycle with each trigger pull and the gears stop exactly where they should. The TITAN MOSFETs installed in the Bolster Armouries ONYX are pre-setup with the optimal settings for the platform and provide instantaneous trigger response and premium level functionality, including protection against over-discharge of your battery, short-circuits, and overheating.

Unlike other advanced MOSFETs, the TITAN has remarkably low power consumption and includes a "sleep mode" which activates when the ONYX has not been fired for some time. This protects your battery in the event that you forget to disconnect it after a skirmish, whilst other MOSFETs may drain the battery entirely over time, rendering the battery useless.

The settings programmed into the TITAN MOSFET by the Bolster Armouries tech team have been selected to provide the absolute optimum settings for the ONYX platform. The pre-set configuration includes pre-cocking set to medium speed for the best balance between prolonging the lifespan of the internals and providing the highly responsive trigger pre-cocking setups are known for.

A new trick up the legendary TITAN’s sleeve is its Expert firmware, now provided by default with every new Gate TITAN MOSFET. The Expert firmware allows for even more customisation options than ever before, but as with previous Bolster builds, the team advise you to stick to the settings they have programmed in to avoid causing undue wear and upsetting the delicate ecosystem inside the ONYX.

Another improvement in the latest TITAN update from Gate is the ability for the TITAN to communicate with the Warhead Industries Electronic Speed Control module installed on the CNC Black Brushless Motor. This enhances electrical efficiency, improves rate of fire and allows the incredible power of the Warhead Brushless motor to be fully unleashed while keeping everything in time and avoiding excessive strain. The TITAN and Warhead Motor combo has always been a match made in heaven and is now better than ever before.

Warhead Industries CNC Ultra High speed (M) Motor 36k RPM - CNC Machined 7075 Aluminium housing

Reduces heat build-up - Exceptionally high rate of fire - Electronic speed control

The motor is perhaps the most important part when it comes to providing extreme levels of performance in an Airsoft AEG, though with a faster motor comes the need to upgrade other internal components to prevent premature failure. In a home build, this often results in an "arms race" of parts so to speak, as whenever a part is upgraded it will require another part to be upgraded to prevent damage and maximize the AEG's potential.

The Bolster Armouries tech team is confident that their gearbox internals are the best available, and the only motor option that provides the speed, smooth running, and longevity to get the most out of the other enhanced parts would be the Warhead Industries Ultra High Speed motor. Known for their innovation and pushing the limits of Airsoft performance, Warhead Industries provide the best Airsoft motor around; utilizing the most up-to-date technology to provide a previously unheard of torque to weight ratio, and impressive heat dispersion.

The Warhead motor is housed inside a CNC machined 7075 aluminium shell with ribs machined in to reduce heat build-up within the motor, avoiding one of the primary causes of motor failure with their pioneering design. Utilizing "brushless" motor technology, the Warhead Ultra High Speed motor is considerably quieter than a standard motor, and uses superior quality Neodymium magnets combined with a hand-wound, temperature-resistant copper stator wind to provide its incredible 36,000 revolutions per minute cyclic rate.

Conventional brushed motors suffer immensely from heat build-up when operated for more than 30 seconds continuously, due to the high internal friction generated. In a brushless motor, the main source of heat build-up is simply friction with the air which can be kept at a manageable level for far longer. With the Warhead motor installed, your trigger finger will get tired far sooner than your ONYX AEG will!

This motor also includes an Electronic Speed Control (ESC) module, which is hidden beneath a CNC machined aluminium cover at the base of the motor. This circuit controls and regulates the speed of the motor whilst providing low voltage cut-off and over-current-draw protection, providing an additional level of safety for your high performance Bolster Armouries ONYX.

Whether breaching rooms is your forte or you prefer to spend your skirmish days on your belly in the bushes, the ONYX SBR [Violet Edition] will prove to be an absolute asset to your arsenal.

A perfectly tuned custom platform built by professionals who take pride in each and every build that leaves the bench, the [Violet Edition] presents the chance to own a fully upgraded premium AEG without worrying about the expense and time commitment of chasing that ever-elusive perfect performance yourself.

The Bolster Armouries team has done all the legwork, testing, troubleshooting, and setup, all you need to do is get out and enjoy the game your way. You can do so with confidence thanks to the 24-month extended warranty and service package supplied with each Bolster Armouries RIF; if anything fails the Bolster team will see that it is resolved as a priority and have you ready to shoot again in no time!

The ONYX SBR [Violet Edition] is probably the best ONYX AEG yet released, benefitting from experience gained over the first 3 (and a half) Bolster Armouries platform drops. With exciting and exclusive aesthetic changes along with improved efficiency thanks to developments in Gate’s TITAN MOSFET allowing communication between it and the Warhead ESC module, the [Violet Edition] produces an astonishing 30 rounds per second in full auto and as with the original ONYX, reaches out to over 60 meters with ease.

This is the closest you will get to "pay to win" when Airsofting; the range, rate of fire and accuracy of the ONYX SBR [Violet Edition] are beyond any mass-produced AEG we have ever seen, raising the lofty performance bar set by the previous Bolster Armouries ONYX variants and equalling the super-speedy OBIRE PCC. When you fire your first shot, you will be astonished, and even more so when you flick the fun switch and let off a long and satisfying burst!

If you are happy to sport every unfair advantage in game but don’t want to go through the trial and error, tuning and faff that goes along with putting together your own custom build, Bolster Armouries has your back. The ONYX SBR [Violet Edition] promises the pinnacle of Airsoft AEG performance, but not just for a game or two before something breaks. For 24 Months, you have your own “Pit Team”, ready to service your ONYX whenever needed to keep it turning and burning at the head of the pack. If you’re looking for the premium Airsoft experience, this is it!

Key Features

  • Custom Aesthetic - There is nothing else like it!
  • PTS Griffin M4SD-K Suppressor - Stylish and functional suppressor
  • Authentic Magpul CTR Stock - The best carbine stock in the world
  • GATE TITAN MOSFET - Unparalleled efficiency and trigger response, now with Expert Firmware
  • Gate EON CNC HOP-up unit- New to the market and very impressive, custom Bolster Violet finish
  • Cerakote Northern Lights Finish - Robust and beautiful at the same time.

Package Includes

  • Bolster Armouries ONYX SBR [EON Edition] Advanced M4 AEG
  • PTS 150rnd EPM Gen.2 Magazine x 2
  • 11.1V 30C 1450Mah LiPo Battery
  • PARRA Rhino Waterproof Hard Rifle Case
  • Bolster Armouries Service Book
  • Bolster Armouries PVC Patch
  • Patrol Base PVC Patch
  • Gate TITAN PVC Patch 
  • Cleaning/Unjamming Rod



Weapon Construction External
Weapon Type
Assault Rifle
Over 18 Only Icon
Over 18
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
FPS Icon
FPS (Feet Per Second), using 0.20g BB
Approx. 342fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Screwdriver Icon
Included Items
  • Magazine x 2
  • PTS Griffin Armament M4SD-K Suppressor
  • Bolster Armouries Service Book
  • Bolster Armouries PVC Patch
  • PARRA Hard Case
  • 11.1V 1450mAh 30C LiPo Battery
Skill Level Icon
User Skill Level
Experienced Player
Patrol Base - Warning Icon
Li-Po - Never Leave Charging Unattended
Li-Po - Only Use Approved Chargers
Li-Po - Charge in a Fire Safe Area
11.1v LiPo required
Li-Po Warning
This LiPo battery must be charged using the balance port and a LiPo balance charger.

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 2.5kg
Weapon Length Collapsed
Length (Collapsed)
Weapon Length Extended
Length (Extended)


Colour Wheel Greyscale
Primary Colour
Colour Wheel Greyscale
Secondary Colour
Northern Lights
Two Tone Icon
Pre Two-Toned
Weapon Construction External
External Construction
Dupont Zytel Polymer
Gearbox Icon
Internal Construction

Weapon Specific

Power Source Icon
Powered By
Blowback Icon
Weapon Platform
AR, M4 / AR-15 / M16, Assault Rifle,
Magazine Style Icon
Magazine Style
Long Gun Magazine, Assault Rifle, M4 / AR Platform,
Fire Select Icon
Fire Selector
PatrolBase | Fire Select Safe
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Weapon Safety Features Icon
Safety Features
Trigger Disconnect
Shooter Configuration Icon
Shooter Configuration
Right Handed
Weapon Configuration Icon
Weapon Configuration
Weapon Scale Icon
Weapon Scale
Suggested BB Weight


Hop-Up Unit Icon
Hop-Up Unit
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Hop-Up Unit Location Icon
Hop-Up Location
Behind mock bolt carrier, accessible when the charging handle is pulled and the mock bolt is locked to the rear.


Weapon Furniture Icon
  • Flip-Up Ironsights
  • Ambidextrous Fire Selector
  • Ambidextrous Sling Plate
  • Authentic Magpul CTR Stock
  • PTS EPG Ergonomic Pistol Grip
  • PTS Fortis Shift Angled Front Grip
  • AR Buffer tube with CERAKOTE finish
  • PTS Griffin Armament M4SD-K Suppressor
  • M-LOK Handguard
  • PTS Raptor Ambidextrous charging handle
Rail System Icon
Rail System
20mm Railed Receiver, M-LOK Rail system,
Icon Stock Positions
Stock Setting
Sliding , Multi-Position ,
Weapon Length Extended
Stock Positions
6 Position
Sight Type Icon
Sight Type
Iron Sights , Aperture Iron Sight,
Sling Plate Icon
Sling Options
Buffer Plate , Stock , QD ,


Outer Barrel Length (in)
Icon Thread Type
Outer Barrel Thread Type
Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
Inner Barrel Diameter
Inner Barrel Length

Magazine Specific

Magazine Type
Medium Capacity , AEG,
Magazine BB Capacity
Approx. 150 Rounds
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location

Electric Gun Specific Information

Gearbox Icon
Gearbox Version
V2 Gearbox
Wiring Icon
Gearbox Wiring
Rear Wired
Spring Change Icon
Gearbox Quick Change Spring
Digital Trigger Icon
Gearbox Electronic Trigger
Split Gearbox Icon
Split Gearbox Design
Airsoft Motor Icon
Motor Type
Warhead Industries CNC Ultra High speed (M) Motor 36k RPM
Battery Specific
Battery Connector
Patrol Base | Icon | Deans
Compatible Battery
Compatible Battery Type
Compatible Battery Configuration
Compatible Battery Voltage

Product Testing Data

Notepad Icon
Test Description
342 FPS +/- 2%
Notepad Icon
Tested Using
Notepad Icon
Test Date

Further Information


The PTS EPM Magazines included with the Bolster Armouries ONYX platform require the very strong internal spring to be bedded in before use. To do this, simply fill the magazines using a standard speed loader (avoid using an ODIN or similar crank wound loader) and empty them again by pulling the BB retainer on the top of the magazine backwards with the feed/fill port pointed in a safe direction, preferably back into your BB bottle. Do this 2-3 times for each magazine before the initial use.


During the testing process, the Bolster Armouries techs found that the Onyx platform performs at its peak when using 11.1V 30C LiPo batteries. The use of a battery with a lower discharge rate (C rating) may cause FPS fluctuation issues and a drop in performance, and this is not considered a fault under the Bolster Armouries warranty. Please carefully consider which battery you use in the Onyx; with this level of internal precision and with a 36K motor and a TITAN MOSFET installed the AEG will require a very specific battery setup to perform at its best.


Our premium custom Airsoft RIFs are assembled from components manufactured by other premium Airsoft and ‘real steel’ brands. Bolster Armouries relates to the name of the custom assembled RIF only. All other brands are original OEM items and not rebranded copies or reproductions. Proof of procurement for all other branded components used can be provided to any other brand owner/manufacturer by contacting

Size guide

Joule Charts

Special Instructions

These table can be used as a reference to see if the BB weight you are using will be over acceptable Joulage limits at some Airsoft Sites in the UK. To check if the weight can be used chrono your weapon using the BB you intend to use, and then compare it to the chart.

FPS, Power and Joule Limits can vary from site to site, so please get in touch with where you're going to play with in advance to avoid disappointment.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, with a 350fps limit for Automatic Replicas, 400fps for Semi-Automatic Replicas, and 500fps for Bolt Action Replicas.

Tap the tabs below to open the relevant chart for your replica.

Suggested limits are based on Joulage Limit rules used Halo Mill: Proving Grounds, and is the equivalent of 350fps, using 0.20g BB resulting in an upper limit of 1.14j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
325 0.98 1.23 1.37 1.47 1.57 1.77 1.96 2.11 2.21 2.45
328 1.00 1.25 1.40 1.50 1.60 1.80 2.00 2.15 2.25 2.50
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
335 1.04 1.30 1.46 1.56 1.67 1.88 2.09 2.24 2.35 2.61
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
345 1.11 1.38 1.55 1.66 1.77 1.99 2.21 2.38 2.49 2.76
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
355 1.17 1.46 1.64 1.76 1.87 2.11 2.34 2.52 2.63 2.93
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 400fps, using 0.20g BB resulting in an upper limit of 1.49j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90

Suggested limits are based on Joulage Limit rules used at Halo Mill: Proving Grounds, and is the equivalent of 500fps, using 0.20g BB resulting in an upper limit of 2.32j.

Velocity BB Weight (Grams)
FPS 0.20 0.25 0.28 0.30 0.32 0.36 0.40 0.43 0.45 0.50
250 0.58 0.73 0.81 0.87 0.93 1.05 1.16 1.25 1.31 1.45
260 0.63 0.79 0.88 0.94 1.00 1.13 1.26 1.35 1.41 1.57
270 0.68 0.85 0.95 1.02 1.08 1.22 1.35 1.46 1.52 1.69
280 0.73 0.91 1.02 1.09 1.17 1.31 1.46 1.57 1.64 1.82
290 0.78 0.98 1.09 1.17 1.25 1.41 1.56 1.68 1.76 1.95
300 0.84 1.05 1.17 1.25 1.34 1.51 1.67 1.80 1.88 2.09
310 0.89 1.12 1.25 1.34 1.43 1.61 1.79 1.92 2.01 2.23
320 0.95 1.19 1.33 1.43 1.52 1.71 1.90 2.05 2.14 2.38
330 1.01 1.26 1.42 1.52 1.62 1.82 2.02 2.18 2.28 2.53
340 1.07 1.34 1.50 1.61 1.72 1.93 2.15 2.31 2.42 2.68
350 1.14 1.42 1.59 1.71 1.82 2.05 2.28 2.45 2.56 2.85
360 1.20 1.51 1.69 1.81 1.93 2.17 2.41 2.59 2.71 3.01
370 1.27 1.59 1.78 1.91 2.03 2.29 2.54 2.73 2.86 3.18
380 1.34 1.68 1.88 2.01 2.15 2.41 2.68 2.88 3.02 3.35
390 1.41 1.77 1.98 2.12 2.26 2.54 2.83 3.04 3.18 3.53
400 1.49 1.86 2.08 2.23 2.38 2.68 2.97 3.20 3.34 3.72
410 1.56 1.95 2.19 2.34 2.50 2.81 3.12 3.36 3.51 3.90
420 1.64 2.05 2.29 2.46 2.62 2.95 3.28 3.52 3.69 4.10
430 1.72 2.15 2.40 2.58 2.75 3.09 3.44 3.69 3.86 4.29
440 1.80 2.25 2.52 2.70 2.88 3.24 3.60 3.87 4.05 4.50
450 1.88 2.35 2.63 2.82 3.01 3.39 3.76 4.04 4.23 4.70
460 1.97 2.46 2.75 2.95 3.15 3.54 3.93 4.23 4.42 4.91
470 2.05 2.57 2.87 3.08 3.28 3.69 4.10 4.41 4.62 5.13
480 2.14 2.68 3.00 3.21 3.42 3.85 4.28 4.60 4.82 5.35
490 2.23 2.79 3.12 3.35 3.57 4.02 4.46 4.80 5.02 5.58
500 2.32 2.90 3.25 3.48 3.72 4.18 4.65 4.99 5.23 5.81
510 2.42 3.02 3.38 3.62 3.87 4.35 4.83 5.20 5.44 6.04