Bolster Armouries OBIRE Advanced PCC AEG

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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.

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The Bolster Armouries OBIRE is the result of the Bolster Tech team taking a walk on the wild side, deviating from the usual M4/AR-15 platform base gun to create an unconventional masterpiece using the SigAir MPX AEG as the starting point. There are only and will only ever be 5 Bolster Armouries OBIRE PCCs in existence so if you find yourself with one in your hands you are one of a privileged few!

As with previous Bolster Armouries releases, the OBIRE PCC is fully revamped on the inside and kitted out with the absolute best aftermarket parts in the business. The Gate TITAN MOSFET takes centre stage, acting as the “brain” of the platform and allowing for unprecedented customisation options, exceptional electrical efficiency and Bluetooth control directly from your phone or mobile device via the Gate Control Station App.

The TITAN is backed up by Laylax, FPS Softair, Lonex, Gate, Pro-Win and Maple Leaf internal parts with the positively epic Warhead Industries 27K Base Brushless Motor providing the torque and speed the OBIRE needs to stay way ahead of its rivals in-game.

A new addition to the Bolster Armouries formula, the Laylax 13:1 Hardened Steel Gearset is fitted, improving mechanical efficiency with a lower gear ratio which translates to less wear and tear on the motor, less current draw from the battery and a higher rate of fire than ever before.

As we might expect, the Bolster Armouries team were not content with simply perfecting the base MPX platform; the externals have been given a full style up to mimic real steel 3-Gun rifles, adding the Task Force MPX Carbine kit with an extended M-LOK handguard and outer barrel, AR buffer tube adapter, flared magazine well and magazine baseplate extension.

This truly transforms the overall vibe of the MPX, moving it away from the platform’s Military/Law Enforcement roots and giving it a new life as a lightning-fast competition-style carbine with remarkable long range performance and super slick handling.

For a platform with a 16-inch handguard and barrel, the OBIRE weighs practically nothing; tipping the scales at a minuscule 2.8 KG, adding a mere 300g to the overall weight of the original MPX despite the massive size disparity. While it may be slightly longer than the average M4, the OBIRE can be swept between targets at incredible speed and really is a true joy to handle, whether you run it in CQB, outdoors or at a competition shoot.

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.

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Bolster Armouries OBIRE Advanced MPX AEG

The base platform for the Bolster Armouries OBIRE PCC is the SigAir MPX SMG paired with the Task Force MPX Carbine Kit, giving you the very best in external quality with detailed SIG trademarks fully licenced via SigAir. The receiver, gearbox shell and controls from the MPX remain, but everything else has been stripped away and replaced with the finest aftermarket upgrades available, installed by some of the most talented and dedicated techs in the Airsoft industry.

With the Task Force kit installed, the squat MPX SMG is transformed into an elegant 3-Gun style competition carbine with an extended handguard and barrel along with a flared magazine well extension and the much loved and ever-familiar M4/AR-15 buffer tube. While the original form of the MPX was designed to fit into your back pocket, the OBIRE MPX makes no compromises when it comes to handling; designed with pure ergonomics in mind to extract the very best shooting performance from whoever is fortunate enough to get their hands on one!

The handguard itself is constructed from CNC machined aluminium and finished with a carbon fibre effect; perfectly marrying the strength of CNC aluminium with the sporty, high speed looks of carbon fibre. While a real carbon fibre handguard would be a nice touch, there is potential that in a skirmishing environment, it may take a bump or scrape, which could result in cracks developing. Being CNC aluminium makes this handguard tough enough to meet the Bolster standard and means you don’t have to baby the OBIRE to maintain its gorgeous looks.

With M-LOK negative space attachment slots at the 3, 6, 9 and 12 o’clock positions along the full-length 16-inch handguard, you will never be short of space for accessories on the OBIRE and have plenty of space to find your optimal gripping position without having to work around any accessories you have mounted.

Additional M-LOK slots are available at the lowermost offset angles so you can further enhance the OBIRE’s handling by adding rail covers or grip tape in classic 3-Gun style, and the upper offset angles have stylish weight-reducing ports which perfectly match those of the MPX receiver, providing the complete and integral look of a professionally customised rifle.

The shape and profile of this handguard make the OBIRE incredibly intuitive and natural to point, acting almost as an extension of your body and allowing you to sweep between multiple targets at incredible speed. Being CNC machined and weight reduced, the handguard is light enough that it doesn’t upset the balance of the platform, resulting in a tenacious rifle which almost steers itself, leading you room to room with vengeful aggression.

The OBIRE’s battery compartment is located up front, inside the handguard, and is accessible with the handguard removed. To install the battery you will need to push the front receiver pin out slightly, after which the handguard can be removed towards the front. The receiver pin is captive and will not fall out, but only needs to be pulled around half of the way out to clear the handguard retainer block and allow the handguard to be removed. If you find you receiver pin is tight, we recommend using a plastic tool (BIC pens work great) to push it through to avoid damage. 

Beneath the handguard, you will find a Deans/T-plug battery connector to which you mount the included NUPROL 11.1V 1450mAh 30C LiPo battery. While there is plenty of room inside the handguard for different battery types, the Bolster Tech Team recommends that you stick to the same C rating, voltage and capacity as the supplied battery for the best performance with this particular setup. We found the best spot to fit the battery is above the barrel, as close to the receiver as possible

The receiver of the base MPX is constructed from aluminium and finished with CNC machining, giving it crisp, sharp details and a flawless shape, matching the real MPX perfectly. Licensed SIG SAUER USA trademarks can be found on the left side of the magazine well in the usual spot; taking the form of the iconic SIG roundel logo seen on many modern Sig platforms, with “SIG MPX” and “MULTI-CAL” just below.

The flared magazine well extension mounts around the receiver, constructed from CNC machined aluminium to keep added weight to an absolute minimum. Designed to provide competition shooters with a valuable reload assistance device which helps guide the magazine into the magwell, flared magwell extensions are finding their way onto more and more combat-optimised platforms and are a great way to reduce your reload times, whether under the scrutiny of a shot timer or in the heat of a firefight.

The receiver itself is also equipped with a 20mm Picatinny rail on its upper surface, giving you a slightly longer receiver rail than an AR platform with extra space for mounting red dot sight and magnifier combos and even larger LPVO optics. Paired with the extended handguard, the receiver rail provides the “step down” look and allows a DBAL or PEQ laser unit to be mounted on the rail and stay clear of any accessories mounted to the 12 o’clock M-LOK slots while avoiding producing a shadow if you make use of the “thumb over bore” grip.

When it comes to the controls, the base MPX platform is already very well equipped. The fire selector switch mimics that of the M4/AR-15 platform but is mirrored on either side; perfect for left or right-handed shooters and those who use of shoulder-to-shoulder transitions to make the best use of cover. Being enlarged and equipped with additional texture on its contact surfaces, the MPX selector switch gives you plenty of grip for wet weather use and is fast to actuate, even when wearing full-finger gloves.

The magazine release is also ambidextrous, located on either side of the magazine well and easily within reach of your trigger finger when the OBIRE is held in a firing grip. Surrounding each of the magazine release buttons is what is known as a “magazine release fence”, preventing the mag release from being accidentally pressed, as any properly designed magazine release button should have.

Also on either side of the receiver is the mock bolt release catch; taking the form of the M4/AR-15 style ping pong paddle on the left side and a button just above the mag release on the right side. This control allows you to return the mock bolt to battery following HOP-up adjustment and is also really fun to play with, letting you enjoy a little hint of realism by racking the charging handle and sending the mock bolt home with an oh-so-satisfying clank.

As we might expect, the charging handle follows the familiar M4/AR-15 format but is ambidextrous, offering a latch on either side so the handle can be pulled with a single finger from either side. Each latch is also extended to make it easy to find when working in low light or while your eyes are busy doing more important things and the surfaces are also serrated to provide optimal wet-weather gripping qualities.

Pulling the charging handle back will open the mock dust cover on the right side and lock the mock bolt back, revealing the Pro-Win rotary adjustable HOP-up unit. If you are curious about what the Bolster Team has done with the HOP-up components, you can read all about it in the “Internal Enhancements” section below.

The original Sig Sauer pistol grip, while a decent design, has been changed up for the gold standard in Airsoft AEG grips; the PTS EPS enhanced pistol grip. This grip is constructed from extremely strong Dupont Zytel polymer, giving it a rock solid feel and perfect comfort for a wide variety of hand shapes and sizes. The EPS is set at a more traditional angle than the Sig MPX grip, meaning cleaner, more efficient motor meshing and reduced wear on the bevel and pinion gears.

At the rear of the receiver, we are treated to the most modern stock attachment interface around. The 1913/20mm Picatinny interface originates on the Sig MCX and MPX platforms and is rapidly appearing on almost every other platform, offering a plethora of specialised stock options for the OBIRE, including the M4/AR-15 buffer tube adapter chosen for this build.

The 1913/20mm interface offers numerous advantages over a fixed M4/AR-15 buffer tube, including the ability to remove the stock assembly in seconds using an Allen key and either swap it for an alternative or allow the OBIRE to be stored in smaller gun cases to save space.

The 1913/20mm interface can also do things the normal fixed buffer tube cannot, allowing side folding stocks or specialised visor stocks to be mounted, allowing for intuitive aiming even when wearing a full face mask, riot helmet or respirator. While the included M4/AR-15 buffer tube is the perfect choice for the OBIRE in its current configuration, you will never find yourself limited in customisation options with access to both 1913/20mm stocks and M4/AR-15 stocks!

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Task Force MPX Carbine Kit

The Task Force MPX Carbine Kit is what makes this MPX such a mould-breaker on the outside; adding a 16-inch M-LOK handguard, 16-inch outer barrel, M4/AR-15 buffer tube adapter, muzzle brake and flared magazine well extension to the OBIRE to give it the ever-popular 3-Gun style aesthetic.

The Handguard

The 16-inch handguard is equipped with M-LOK negative space attachment slots at the 3, 6, 9 and 12 o’clock positions, allowing M-LOK accessories to be directly mounted for a slick and modern setup. Additional M-LOK slots are available at the lowermost offset angles, with weight-reducing ports at the offset angles above matching those of the MPX receiver, giving the whole OBIRE the look and feel of a completed piece as opposed to an amalgamation of aftermarket parts.

M-LOK also allows 20mm Picatinny accessories to be used with 20mm rail adapters, meaning if your preferred grip is only available in 20mm or your favourite flashlight requires a 20mm rail to mount, you will not be held back by the ultra-modern attachment interface of the OBIRE.

The advantage of a longer handguard is that the rifle will be easier to point and sweep rapidly between targets using modern shooting stances and you have extra space to mount your attachments in a spot which suits you without making everything cramped.

The handguard is constructed from CNC machined aluminium and finished with a faux carbon fibre coating, deviating slightly from the real rifle to add the appropriate strength needed for a long lifespan under the rigours of Airsoft skirmishing.

Real carbon fibre may be lighter than CNC aluminium, but if you accidentally hit a piece of cover there is potential that it will splinter and crack. The marriage of CNC machined aluminium with the styling of carbon fibre gives you the high speed 3-Gun aesthetic while immunising the rifle from the knocks, bumps and scrapes that come with combat use. The Bolster Armouries OBIRE is a gorgeous piece and would look fantastic on the wall, but it is designed for skirmishing and is equipped to take the hard knocks that come with it.

The Barrel & Muzzle Device

Being smooth in profile with a CNC machined aluminium muzzle brake mounted at the tip, the 16-inch outer barrel transforms the original MPX platform to suit the 3-Gun styling of the OBIRE, allowing the 407mm Laylax Prometheus 6.03mm tightbore to be installed inside; a far longer inner barrel than the standard version, intended to enhance long range effectiveness.

The muzzle brake can be swapped out for any alternative 14mm CCW-compatible flash hider, tracer unit or suppressor should you see fit. Naturally, a muzzle brake is the perfect device for a 3-Gun build and looks fantastic with its menacing, multi-port design but we know Airsofters value the ability to mount a tracer for CQB or a suppressor for sneaky stuff.  If we encounter a OBIRE in the wild without its muzzle brake, we promise we won’t get offended!

The Flared Magazine Well Extension

A flared magazine well extension is a great way to speed up your reloads whether you are in the heat of an Airsoft skirmish or trying to shave a few seconds off that personal best when shooting against the clock.

This part fits around the existing MPX magazine well, giving you a wider opening to insert your mag with a bevelled inner surface to guide it home. This eliminates the possibility of missing the magazine well when working under pressure, meaning less mid-firefight fumbling and more time spent shooting!

Constructed from CNC machined aluminium with a flawless matt black anodised finish applied, the flared magwell fits in nicely with the 3-Gun style aesthetic of the OBIRE and is a serious game changer when it comes to handling.

The flared magazine well extension can also be handy as an additional gripping surface when shooting in unconventional positions where gripping the handguard may put your arm in the line of fire, allowing you to use cover more effectively in close-quarters environments.

Allowing for far faster reloads than without and enhancing your ability to carry out “eyes up” reloads while you scan the environment for your next target, flared magazine wells are becoming commonplace, not just in competition builds but in combat-style builds as well. The flared magazine well will save you hours and hours practising your reloads, and if you already put that time in, you will be faster than ever before!

The Buffer Tube adapter

Mounted to the 1913/20mm Picatinny interface at the rear of the OBIRE MPX, we have an M4/AR-15 buffer tube adapter, giving you access to the widest stock aftermarket in existence. As with most of the Task Force kit, the buffer tube adapter is constructed from CNC machined aluminium and finished in matt black, giving the OBIRE a custom touch without stealing the thunder of the carbon fibre style handguard.

M4/AR-15 Stock options are as prolific as stars in the night sky, so if you have a preferred option to maintain commonality with your other platforms or you think a certain stock suits the OBIRE more than the NUPROL A.X.E chosen by the Bolster Team, you can switch it out in seconds without needing any tools.

The buffer tube provides 6 positions of adjustment, allowing you to set the length of pull to perfectly fit your arm length, shooting stance and loadout. Adjustments are carried out using the adjustment lever on the NURPOL A.X.E stock; holding it down will allow you to slide the stock out to your chosen length and releasing it will lock the stock in position.

As this buffer tube is not permanently attached to the receiver, it can be removed and swapped out for any 1913/20mm Picatinny interface compatible stock, including lightweight low-profile side folding stocks, stocks designed for shooting with a visor or respirator and any of the many other options available for this up and coming stock mounting interface.

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Ergonomic Enhancements

Along with the Task Force MPX Carbine Kit, the Bolster Armouries OBIRE has been equipped with a host of 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 OBIRE platform. The EPG is constructed from Dupont Zytel, a high-strength, abrasion and impact-resistant thermoplastic polyamide/nylon, making it a significant step up from other high density polymers, even beating out the original SigAir pistol grip.

With comfortable dot texturing on either side and crackle texture on the front strap and backstrap, the EPG is the perfect enhancement to ensure you maintain a positive grip on the OBIRE in any weather condition, even when 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.

Mounted to the M4/AR-15 buffer tube which is itself fitted to a 1913/20mm interface, the NUPROL A.X.E stock was chosen for its low-profile design, leaning into the high speed, 3-gun style aesthetic of the OBIRE. Constructed from high density polymer with a serrated rubber butt plate, the A.X.E is considerably weight-reduced, with ports across the design which also add to its modern aesthetic. Being a low snag design based on real steel minimalist AR stocks, the A.X.E perfectly balances out both the weight and looks of the OBIRE, making for an intuitive and agile handling experience and a stock that perfectly suits the rifle's dynamic styling.

The A.X.E stock’s adjustment lever is recessed into the design, keeping it well clear of your sling and equipment while allowing easy access for fast adjustments and plenty of traction in wet weather thanks to its textured surface. The A.X.E offers 6 positions of adjustment so you can set the length of pull to suit your body type and preferred shooting stance.

The weight-reducing ports of the A.X.E stock allow for paracord to be added to further protect the adjustment lever from accidentally being pressed. Its cheekpiece is slightly enlarged and sloped at the rear, giving you a more comfortable cheek weld when aiming down an optical sight, similar to a Crane stock but slimmed down, with a sleeker and more modern look.

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Internal Enhancements

The internal parts present in the Bolster Armouries OBIRE 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 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, coupled with the precision machined Pro-Win rotary HOP-up unit and a Prometheus purple HOP rubber which is based on the original Marui design but is comprised of longer lasting materials. Let's have a closer look at what goes into a OBIRE AEG, and why these parts are so noteworthy:

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Laylax/Prometheus 6.03mm EG Inner Barrel - 407mm - Stainless Steel

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Laylax EG Hardened Steel 13:1 High Speed Gear Set - Heat Treated Japanese Steel

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Gate Protector Cylinder head - CNC Machined Aluminium

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Gate Power CNC Aluminium Hybrid Piston Head - CNC Machined Aluminium

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

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

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Gate NOVA CNC Aluminium Enhanced Trigger 2B1 - CNC Machined Aluminium

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CYMA Platinum Polycarbonate Piston with Full Steel Tooth Rack - Polycarbonate with Carbon Steel teeth

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Bolster Armouries M115 Spring - Ferrosilicochrome with Zinc coating

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Lonex Anti-Reversal Latch - Hardened Steel

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Bolster Armouries EZO Bearings - Heat Treated Japanese Steel

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Laylax Ball Bearing Spring Guide for MPX - Hardened Steel

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Gate TITAN MOSFET V2 USB link Advanced Set

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 OBIRE 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 OBIRE 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 OBIRE 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.

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Warhead Industries Base Brushless Motor 27k RPM -  Aluminium housing - SH Rated Magnets

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.

Known for innovation and pushing the limits of Airsoft performance, Warhead Industries provides 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 original Warhead CNC Black Brushless Motor of previous Bolster builds has been exchanged for the Warhead Base Brushless Motor in this build, keeping the costs within the Bolster Armouries brief while not compromising on performance thanks to its pairing with the Laylax 13:1 high-speed gear set.

While the 27K RPM of this motor is slightly less than that of the full-fat CNC 36K Black motor used in the Bolster Armouries ONYX, ARKOSE and ATLAS platforms, the OBIRE is actually slightly faster when it comes to rate of fire thanks to its high speed gears!

The Warhead Base uses a machine wound stator instead of the hand-wound stator used in the CNC Black motor, reducing production costs while maintaining high standards and beating out any other brushless motor on the market, with the exception of the Warhead CNC Black motor.

The magnets used in the Warhead Base are still of the highest quality and provide exceptional trigger response and speed. Being SH-rated, the magnets in the Base are still capable of operating at extremely high temperatures and have incredible torque capability, albeit slightly less than the far more expensive CNC Black.

Magnets rated SH are Neodymium magnets specifically manufactured to withstand demagnetisation forces like extreme heat or magnetic pulses, meaning you can run the Warhead Base all day long without worry, letting off long bursts and acting almost as an LMG gunner, as you can with the Warhead CNC Black motor.

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.

Like the original CNC Black version, the Warhead Base motor also includes an Electronic Speed Control (ESC) module, which is hidden beneath an aluminium cover at the base of the motor. This circuit controls and regulates the speed of the motor while providing low voltage cut-off and over-current-draw protection, providing an additional level of safety for your high performance Bolster Armouries OBIRE AEG.

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Whether you are a CQB specialist, a woodland warrior or a competitive shooter, Bolster Armouries presents the opportunity to pick up a perfectly tuned custom 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 shoot! You can do so with confidence due to the 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 OBIRE builds on experience gleaned over a very successful first 3 Bolster Armouries platform drops, transplanting the phenomenal ONYX feature set into an equally gorgeous exterior based on the flawlessly built SigAir MPX with the spectacularly beautiful Task Force MPX PCC kit. The result is an external look and feel which is without compromise, offering the striking looks and textured feel of carbon fibre without compromising the pre-requisite skirmish sturdiness.

This is the closest you will get to "pay to win" when Airsofting; the range, rate of fire and accuracy of the OBIRE MPX PCC are beyond any mass-produced AEG we have ever seen, matching the lofty performance bar set by previous Bolster Armouries releases and maintaining, even surpassing some of our custom setups with years of work put into them. When put to the test, the OBIRE’s performance will speak for itself!

If you love having the upper hand, like to move swiftly and prioritise rapid target-to-target transitions then you will absolutely love the OBIRE MPX PCC. OBIRE is Latin for The Bringer of Death, and though you may not bring death to your enemies with it, they will experience respawn far more often than they'd like!