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£17.99
  • Polymer piston with 4 steel teeth
  • Piston head with O-ring pre-installed
  • Compatible with V2 gearbox M4/AR-15 AEG

If you have stripped your piston and need a replacement, here ya go! The KRYTAC Piston & Piston Head Assembly V2 for M4/AR-15 AEG is a replacement original parts set including a polymer piston with a 4-tooth steel rack and a polymer piston head with pre-installed O-ring. The set is designed for the Krytac Trident AEG series but is compatible with M4/AR-15 AEGs equipped with a version 2 gearbox. 

£44.99
  • Plug & Play / Installed
  • 3rnd Burst and ROF Adjuster
  • Programmable Smart Trigger

Generation 3 Micro Computer Programmable Controller Chip Set designed to add a huge variety of functionality to Airsoft AEG. 

£49.99
  • Hardened steel gearset
  • 18:1 Ratio
  • For Version 2/3 Gearbox

If you are looking for exceptional performance for your AEG, either for a high rate of fire build or a DMR running at higher than normal FPS reinforced gears are a must for long term reliability under increased stress. The Laylax EG Hard Gear Set is compatible with any AEG with a version 2 or version 3 gearbox and includes a hardened steel spur gear, sector gear and bevel gear. This gearset is a standard ratio set (18:1), intended to provide a great compromise between high speed and high torque, allowing you to take your build in either direction and still benefit from reinforced gears!

£19.99
  • 3rd Generation Mosfets
  • Trigger Protecting MOSFET
  • Multifunctional AEG Controller

Generation 3 Micro Computer Controller Chip Set designed to add a huge variety of functionality to Airsoft AEG. The chip is built to be as compact as possible, requiring the smallest amount space possible, and is specially coated to the Military Specification (Mil-Spec) MIL-V-173C.

£129.99
  • CNC 7075 Aluminium construction
  • Gate Advanced gearbox - designed for TITAN, ASTER and EON
  • Probably the best gearbox shell we have ever seen!

If you are looking for a high end gearbox shell to start your ultimate AEG build, stop looking, you found the best there is! The Gate EON gearbox shell is CNC machined from 7075 aluminium for a strong and lightweight gearbox with a plethora of small enhancements that make this gearbox a dream to put together.

The cylinder window is radiused on all corners and the shell has some significant reinforcements at the front end, and along the top spine. The internal wire routing has been redesigned for ease of installation, and the shell is perforated with several inspection windows so you can set your angle of engagement, adjust your pre-cocking settings and shim your gears perfectly. Is this the ultimate Airsoft gearbox? Well, it will be, once you've built it!

£134.99
  • CNC 7075 Aluminium construction
  • Gate Advanced gearbox - designed for TITAN, ASTER and EON
  • Probably the best gearbox shell we have ever seen!

If you are looking for a high end gearbox shell to start your ultimate AEG build, stop looking, you found the best there is! The Gate EON gearbox shell is CNC machined from 7075 aluminium for a strong and lightweight gearbox with a plethora of small enhancements that make this gearbox a dream to put together.

The cylinder window is radiused on all corners and the shell has some significant reinforcements at the front end, and along the top spine. The internal wire routing has been redesigned for ease of installation, and the shell is perforated with several inspection windows so you can set your angle of engagement, adjust your pre-cocking settings and shim your gears perfectly. Is this the ultimate Airsoft gearbox? Well, it will be, once you've built it!

£1.99
  • Increased reliability
  • High-quality rubber
  • Superior airseal

If you're looking for a sturdy upgrade to your AEG, the FPS Softair Piston Head O-Ring Seal is a worthy contender. Constructed from high-density rubber for a superior seal to increase the reliable and lifespan of your rifle. This O-ring is likely to improve your air consistency, which may result in increased accuracy and is compatible with most piston heads.

£8.99
  • For V2 Gearbox
  • Perfect Spare Part
  • Replace Burnt Contacts

A replacement unit for Version 2 Airsoft AEG Gearboxes. This unit is the perfect replacement for any worn or burnt out trigger mechanisms you have in your current Airsoft AEG. 

£14.99
  • Fits Any AEG
  • Ultra Compact
  • Protects Trigger Contact

An ultra compact Generation 3 MOSFET built to be as compact as possible, requiring the smallest amount space possible, and is water resistant. 

£18.99
  • 6.02mm Tightbore barrel
  • Stainless steel construction
  • For most Airsoft AEGs

If your AEG needs a bit of extra accuracy to get the job done, a tightbore inner barrel will do the trick! This Stainless Steel Tightbore Inner Barrel from ZCI has a 6.02mm bore, meaning a slight rise in FPS using the same mainspring and improvements in accuracy at long range. 

These barrels are designed to fit any Tokyo Marui spec AEG and are constructed from stainless steel for maximum rigidity and to retain straightness in the long term. Ideal for an AEG DMR build or any other AEG-based build which requires accuracy and more long range performance, the ZCI Tightbore will have your AEG shooting at its very best!

£29.99
  • Low Travel Trigger
  • For ASG Scorpion Evo
  • No Modification Needed

A replacement Trigger for the Scorpion Evo, which is designed to be dropped into the gun and decrease the amount of travel time in the trigger, allowing for faster repeat shots. 

£34.99
  • AEG Controller
  • AEG Protection
  • Huge Improvements

A Generation 3 Micro Computer Controller Chip Set designed to add a huge variety of functionality to Airsoft AEG. The chip is built to be as compact as possible, requiring the smallest amount space and is specially coated to the Military Specification (Mil-Spec) MIL-V-173C. 

£2.99
  • All 9cm Long
  • Various Colours
  • Set Of 21 Tubes

A heat-shrink kit designed to give you all the heat-shrink you'll need when working on a project gun or replacing wires. The heat-shrink is constructed from PVC, and shrinks in size when heated, designed to protect wires and other electrical components.

£6.79
Was £7.99
Save £1.20
  • Screw Fit Installation
  • Improve Consistency
  • Reduce Barrel Movement

This polymer constructed piece is designed to screw into your outer barrel assembly, to lock your Inner Barrel in place and removing any motion that is is able to have. This will help improve accuracy and consistency by stopping the inner barrel from wobbling as the BB travels through it. There is an option available for most major platforms, and is an absolute must-have piece for those seeking perfection in their rifles.

£6.79
Was £7.99
Save £1.20
  • Screw Fit Installation
  • Improve Consistency
  • Reduce Barrel Movement

This polymer constructed piece is designed to screw into your outer barrel assembly, to lock your Inner Barrel in place and removing any motion that is is able to have. This will help improve accuracy and consistency by stopping the inner barrel from wobbling as the BB travels through it. There is an option available for most major platforms, and is an absolute must-have piece for those seeking perfection in their rifles.

£6.79
Was £7.99
Save £1.20
  • Screw Fit Installation
  • Improve Consistency
  • Reduce Barrel Movement

This polymer constructed piece is designed to screw into your outer barrel assembly, to lock your Inner Barrel in place and removing any motion that is is able to have. This will help improve accuracy and consistency by stopping the inner barrel from wobbling as the BB travels through it. There is an option available for most major platforms, and is an absolute must-have piece for those seeking perfection in their rifles.

£29.99
  • 6.03mm x 455mm
  • Upgrade AEG Barrel
  • Increase Performance

An upgrade Airsoft 6mm BB Gun Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units. The barrel is constructed from Alloy, then Hard Coated via an Anodising Process. 

£1.99
  • Spring set for AR36 Version 3 gearbox
  • All springs except mainspring included
  • Fix up your old AR36 or build a gearbox!

If you are building a version 3 AR36 gearbox or you have an old AR36 AEG that needs a refit, this spring set will be useful! The set includes all the springs needed to complete a version 3 gearbox for AR36 AEGs except for the mainspring (the spring that provides the power). Maybe you have lost a spring, or your tappet spring got chewed up after a long and hard life? This spring set should give you all you need to get your AR36 doing its dirty work once again!

£15.99
  • Polymer construction
  • Replacement original part
  • Compatible with version 2 gearboxes

If your tappet plate has broken due to some high rate of fire shenanigans, here is what you need to fix her up! The KRYTAC Tappet Plate for Version 2 Gearbox is a replacement original part, designed for the Krytac Trident AEG series but should be compatible with almost every Version 2 gearbox on the market. The set includes the tappet plate only and does not come with a nozzle or tappet plate spring. 

£19.99
  • High strength, low weight
  • Polymer body and metal teeth
  • For TM NGRS M4 variants only

FPS Softair brings you a super high quality M4 piston with a technopolymer body and a full rack of steel teeth for a good combination of high strength and low weight. This is compatible with Tokyo Marui NGRS M4 gearboxes, aka the Version 9 gearbox. Please note, this piston is not compatible with the TM NGRS SCAR-L or SCAR-H. 

The loaded technopolymer assures great mechanical resistance and dimensional precision. The rack was manufactured through the use of MIM (Metal Injection Moulding) technology since this production process guarantees dimensional accuracy and sturdiness equal to those of solid machining.

Currently considered the best for this type of use, the metal injected is SAE 4650 steel. The sliding guides are designed to minimize friction and hold the lubricant for a long period of time, so you can be safe in the knowledge that your AEG will have reliable and long-lasting cycle functionality.

£69.99
  • Highly Programable
  • Very Easy To Program
  • Connectors & Wire Inc.

A complete unit to fit into any Airsoft AEG no matter what version gearbox you own. Included is everything from MOSFET to wiring, connectors and programming card.

£11.89
Was £13.99
Save £2.10
  • Replacement original KRYTAC part
  • Padding for sound dampening
  • Tight tolerances for optimum air seal

An AEG cylinder head for version 2 gearboxes found in M4/AR15 AEGs and SMG-5 AEGs. This KRYTAC part features a dampening pad, intended to reduce the noise from the piston impacting the cylinder head and give you a smoother sounding gearbox. The cylinder head is constructed from high density polymer with a brass inner nozzle and a rubber dampening pad.

£11.99
  • Silicon Coated
  • 2 Metres Length
  • Highly Conductive

Super conductive and easy to route throughout your gearbox and rest of your Airsoft AEG.

£12.99
  • Bearings
  • For V2 Gearboxes
  • Ultimate Upgrade Part

An upgrade or replacement spring guide for Version 2 gearboxes.

*Please note this item has been updated by ASG and now comes in black rather than silver

£18.99
  • Compatible with Perun V2 Hybrid MOSFET
  • Gives your trigger more realistic feedback
  • Great for realism fans!

If you are lucky enough to have an AEG with the superb Perun V2 Hybrid MOSFET installed, here is how you make it more realistic! The Perun Clicker is designed to work with the V2 Hybrid MOSFET and provides a tactile click when the trigger is pulled, along with a tactile reset. This gives the trigger a far more realistic feel, and while not close to the feel of a real trigger, is far more exciting to use than a normal AEG trigger. 

£2.99
Was £3.99
Save £1.00
  • Replacement screws
  • For Version 3 gearbox motor cage
  • Replace your lost bits!

If you have misplaced a screw from your motor cage during upgrading/maintaining your version 3 gearbox, no need to hunt for the perfect screw! This screw set from Specna Arms provides all the screws necessary to attach your motor cage to the gearbox and secure the motor inside the cage.

£8.99
  • Double Sealed Nozzle
  • CNC Machined Aluminium 
  • High Performing Upgrade Part

The EPeS Airsoft Nozzle series is a line of super durable, high performing Airsoft Electric Nozzles designed to massively improve the performance and longevity of your airsoft gun.

£8.99
  • Double Sealed Nozzle
  • CNC Machined Aluminium 
  • High Performing Upgrade Part

The EPeS Airsoft Nozzle series is a line of super durable, high performing Airsoft Electric Nozzles designed to massively improve the performance and longevity of your airsoft gun.

£9.99
  • R-HOP Kit - Improves accuracy
  • Includes bucking, HOP arm & nub
  • Ideal for any accurised AEG build

If you're looking for accuracy improvements for your M4/AR-15 AEG, the Delta Armory TRINITY R-Hop Bucking Bundle for AEG is what you need to tighten your groupings. This set includes an enhanced HOP-up arm, HOP-up bucking and OMEGA-style nub manufactured for Delta by upgrade legends Psionic Upgrades. The included HOP-up arm is designed for M4/AR-15 AEG rotary HOP-up units, specifically the Delta Armory/Specna Arms/Evolution/Lancer Tactical type but the bucking and nub are compatible with other Airsoft AEGs of all different shapes and sizes. 

The inner patch of the TRINITY bucking is diamond-shaped, similar to the Maple Leaf Super bucking, intended to improve accuracy by applying backspin more consistently. The advantage of using a TRINITY set rather than doing all the mods yourself is its simple drop-in installation, low price compared to sourcing a separate bucking, nub and HOP-up arm and guaranteed compatibility, meaning no chance your nub doesn't work with your chosen bucking. If you're looking for tighter groupings from your Airsoft AEG, the TRINITY R-HOP Bucking Bundle is the one to go for!

£11.89
Was £13.99
Save £2.10
  • Ported Cylinder
  • Well suited to short barrels (<363mm)
  • Brass construction

A replacement original KRYTAC part which fits version 2, 3, 6 and 7 gearboxes. This cylinder is a Type 1, meaning it has a port in the side intended to reduce the air volume for use on short barrelled platforms (<363mm inner barrel) and prevent the "suck back" phenomenon.

Level up your AEG and get CQB ready

Browse our full spectrum of AEG internal parts, including P90 parts that allow you to upgrade your electric SMG, as well as parts suitable for AEP mods and more. 

From steel airsoft motors to electric triggers, we only ever stock named brands we’ve tried and tested ourselves. Plus, if you want to make some changes to your airsoft gun, our expert technical team will be happy to support you - simply get in touch with us and let us know what you need. 

Our collection of airsoft upgrades is second to none, so why shop anywhere else? Browse online today for next day delivery.