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£14.99
  • CNC Aluminium construction
  • O-ring Equipped
  • Compatible with V2 & V3 gearboxes

If you're working on your gearbox and looking for more efficiency, the Lonex Aluminium Piston Head for V2/V3 Gearbox is ideal for your build. This piston head is constructed from CNC aluminium and is equipped with a rubber O-ring surrounding its surface to close the gap between the piston head and cylinder, ensuring every bit of air compressed by the piston is translated into downrange effect.

This piston head is compatible with version 2 and version 3 AEG gearboxes and is a handy part to have around for the techy types. Whether you're building a custom gearbox or upgrading, the Lonex Aluminium Piston Head for V2/V3 Gearbox is an essential part!

£43.99
  • Programmable ETU/MOSFET
  • Offers Burst, binary, semi-only & AUG mode
  • For version 2 M4/AR-15 AEG gearboxes

If you want to turn your version 2 gearbox-equipped AEG into a true space gun, the Delta Armory EAGLE™ Programmable MOSFET Control Unit is one of the most affordable ways to do it. The EAGLE™ is compatible with any Airsoft AEG which uses a version 2 gearbox and improves trigger response and rate of fire through its gains in electrical efficiency, amongst its many other benefits!

The EAGLE™ offers more programmable options than many of its rivals in the cheap MOSFET game. These include 3 or 5-round burst mode, binary trigger, sniper delay, AUG mode, semi-auto only, 5 levels of trigger sensitivity adjustment and adjustable pre-cocking, with 6 levels to choose from. Active braking can also be turned on or off and all programmable options can be set using the trigger and fire selector of your AEG, avoiding the additional expense of needing an app or PC connectivity to take advantage of the wealth of programmable options available. 

Naturally, the EAGLE™ will require a certain amount of skill and expertise to install so if this is your first time, we recommend consulting an experienced technician. Compatibility-wise, the EAGLE™ is designed for M4/AR-15 version 2 gearboxes specifically and should be compatible with most V2 gearbox shells on the market, though we have not yet confirmed whether it will work with G3 and SMG-5 platforms. If you're looking for an affordable way to add fancy features to your M4/AR-15 AEG, the EAGLE™ Programmable MOSFET Control Unit from Delta Armory is exactly that!

£49.99
  • Long shaft motor
  • Hardened steel pinion gear
  • For M4/AR-15, SMG-5, P90 & G3 AEGs

If you're working on a high-speed AEG build, the Prometheus High Speed Motor with Hard Pinion Gear will give you the speed you need! This long shaft motor is compatible with M4/AR-15, SMG-5, G3 and P90 AEGs, offering an improved rate of fire, reliability and strength thanks to its pre-installed hardened steel pinion gear. 

The set includes the motor itself, the hardened steel pinion gear, a pinion spring and a polymer storage box so you can keep the motor clean and dust-free prior to installation. The motor spade connectors are also pre-wired in for easy installation, though the motor height will need adjustment manually once the motor is installed. 

Laylax/Prometheus is one of the most trusted names in the Airsoft industry when it comes to upgrade parts, with decades of experience and a great reputation with Airsoft techs. If a high-speed motor is on your shopping list, the Prometheus High Speed Motor with Hard Pinion Gear is a fantastic choice!

£1.99
  • Less wear than O-rings
  • Lower contact pressure
  • More consistent pressure

For a sturdy upgrade to your AEG the FPS X-Ring is a piston head seal with a quadrilobate section, which during dynamic stresses are not subject to seal rounding.

X-Rings have less wear than O-Rings as they require less radial pre-stress which results in lower contact pressure.
A lubricant reservoir can be created between the sealing lips using silicone.

Installing this ring will optimise the sealing effect thanks to a better pressure distribution due to the square section.
The X-Ring eliminates any negative effects due to the closing line of the mould, as this is located in the groove between the two lips.

£1.99
  • 2 x Male, 1 x Female connector
  • Black coloured external connectors
  • Replace your old/damaged connectors

If you have damaged your battery connector or you need spares for a build project, this set will sort you out! The NUPROL Mini-Tamiya Connectors Set includes 2 male and 1 female mini-Tamiya connectors with black external connectors.

The packaging states that the set includes 1 male and 2 female connectors but this is based on the external connector design. What is actually included is one connector for your gun(female) and 2 for the battery side(male), click here to see why we classify battery connectors this way.

A useful spare to have around for repairs and equally useful for scratch builds, the NUPROL Mini-Tamiya Connectors Set is a great set to have around just in case!

£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. 

£39.99
  • Stainless steel construction
  • 6.03mm Tightbore inner barrel
  • For most Airsoft AEGs - Standard AEG barrel cut

If you want to squeeze a bit more accuracy and FPS out of your AEG, Laylax has just the thing. This 6.03mm Tightbore Inner barrel is part of the Laylax Prometheus range, widely regarded as the best source for AEG upgrade parts in the world. Inner barrels from this same range are known for their rigid stainless steel construction and immaculate internal finish and are what we use in the phenomenal Bolster Armouries AEGs.

This 6.03mm tightbore is designed for AEG rifles, SMGs, and support guns which use the Tokyo Marui AEG style of barrel cut, which is the vast majority on the market, and will provide an accuracy improvement thanks to its finely polished internal surfaces and a slight increase in FPS thanks to the tighter bore improving air seal and the overall efficiency of the system.

£129.99
  • Complete V2 Gearbox for SMG-5 AEGs
  • MOSFET, High-speed motor & high-speed gears
  • Pre-wired to Deans and ready to drop in!

Whether you are upgrading your SMG-5 or repairing it, the CYMA CM.041G/CM.041H Complete Gearbox E-Edition High-Speed is a great excuse to do both at the same time! This gearbox is a Version 2, designed for CYMA CM.041 series SMG-5 AEGs but should fit most SMG-5 AEGs on the market (not SMG-5K) and also includes a high-speed motor of the long shaft variety.

As the heart of the CYMA E-Edition High-Speed Platinum AEG series, this gearbox is absolutely packed with upgraded parts. Highlights of the internals include the CYMA MOSFET/ETU system, steel high-speed 13:1 ratio gears, an aluminium silent piston head and cylinder head and a quick change spring system. Being a replacement original parts set, this gearbox is the exact setup found in the superb CM.041G and CM.041H AEGs, meaning if you have ever been envious of their performance you can now make your SMG-5 shoot just as nicely!

£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!

£3.99
  • Great Spare Part
  • All Metal Construction
  • Set of 0.15 and 0.3 Thick Shims

A set of both thick and thin shims, useful for ensuring your gearbox turns over as smooth as possible.

£5.99
  • Polymer construction
  • For most version 2 gearboxes
  • An affordable replacement part

If you like to keep spare parts on hand, are building a gearbox from scratch or have had a tappet plate failure, CYMA's Tappet Plate for V2 Gearbox is ideal. This tappet plate is designed for version 2 gearboxes and is constructed from polymer. As with all internal parts, we recommend doing your research before attempting to install this tappet plate or consulting a tech who can advise. 

£6.99
  • Replacement trigger spring
  • Reduced trigger weight
  • For Airsoft AEG with V2 gearbox - M4, SMG-5, G3

If you have had a mishap when exploring your gearbox internals and the trigger spring has gone walkies, Laylax have your back with its Lightweight Trigger Spring Set. This set provides 2 trigger springs constructed from spring steel with a lighter pull than the original trigger spring, allowing for faster semi-auto spam. The springs are compatible with AEGs which use the Version 2 gearbox, including M4/AR15s, G3 and SMG-5 AEGs.

£7.99
Was £9.99
Save £2.00
  • 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.

£7.99
Was £9.99
Save £2.00
  • 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.

£7.99
Was £9.99
Save £2.00
  • 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.

£1.99
  • Superior o-ring seal
  • Ultimate reliability
  • High-quality rubber construction

If you're looking for a sturdy upgrade to your AEG, you can't get any better than something from Bolster Armouries. This O-ring is constructed from high-density rubber and provides a superior seal to increase the reliability and lifespan of your Airsoft rifle. This O-ring can improve your air seal consistency, which can result in increased accuracy. This o-ring is compatible with most AEG piston heads.

£4.50
  • Gold Plated 
  • Includes Heat Shrink
  • 10 Connectors Per Pack

If you have a damaged wire, snapped motor connector or just want to improve your electric conductivity then this pack is ideal.

£4.99
  • Replacement original part
  • Hardened steel construction
  • For version 2 & version 3 AEG gearboxes

If you have had a mishap with your bevel gear, this KRYTAC replacement part should sort it! The KRYTAC Bevel Gear Assembly for V2/3 AEG Gearbox is constructed from hardened steel and is compatible with any AEG which uses a V2 or V3 gearbox. The hardened steel construction makes this bevel gear perfect to pair with an upgraded motor to guarantee long-term performance.

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

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

£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. 

£42.99
  • 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. 

£89.99
  • TITAN™ MOSFET
  • For Version 3 gearboxes
  • Expert Firmware included

If you're running an AEG with a version 3 gearbox, the Gate TITAN™ MOSFET V3; Expert Firmware is what you need to turn your primary into a space gun! This advanced MOSFET/ETU system is the latest version of the original TITAN™, designed for version 3 gearboxes found in AK, AR36, AUG and SMG-5K AEGs, boasting a drop-in fit with the vast majority of V3 shells on the market. That said, the TITAN™ still requires knowledge of AEG internals, care and patience to install; as such, we only recommend this upgrade for those with a decent level of technical knowledge and confidence working on AEGs.

The latest version of the TITAN™ V3 includes the Expert Firmware, meaning you have immediate access to the most advanced programming functions of the TITAN™ without needing to pay more to update the firmware. With the Gate USB-Link or Blulink, you can set your pre-cocking level for a speedy trigger response, adjust your trigger sensitivity, tune active braking and adjust the rate of fire for a truly custom setup that suits your playstyle perfectly. The usual programmable MOSFET functions of other ETUs are also present, including burst mode, binary trigger, semi-auto-only, ramping semi-auto, dual-stage trigger and sniper delay.

For those in the process of transforming their V3 gearbox-equipped AEG into an absolute beast, the Gate TITAN™ MOSFET V3; Expert Firmware is an essential addition to your shopping list. The TITAN™ extends the lifespan of your AEG by eliminating the cut-off lever and trigger contacts, along with offering unprecedented trigger sensitivity, fire mode and cycle control adjustment options. If you want your AEG to perform at the top of its game, the TITAN™ is a big part of achieving that!

£39.99
  • CNC 7075 Aluminium
  • Includes threaded collet nut
  • Compatible with AK-47/74 AEGs

If you're working on the ultimate AK AEG build, the RetroArms Precision CNC HOP-Up Chamber for AK AEGs is an integral part! This CNC machined HOP-up unit is made from 7075 Aluminium, granting it steel-like strength and flawlessly precise machining with the weight reduction perks of aluminium. 

The most unique aspect of this HOP-up unit is the inclusion of what RetroArms call the "collet nut", a threaded nut which seals the gap between the inner barrel and HOP-up chamber walls. This saves you any messing around with PTFE tape and ensures your platform's air-seal is perfect, resulting in more consistent FPS readings translating to improved accuracy downrange. 

The set includes everything you'll need to complete the HOP-up unit with the exception of the bucking, nub and inner barrel but will require assembly. As such, we only recommend this HOP-up unit to those confident working on Airsoft internals. Best used with the RetroArms CNC Version 3 Gearbox but compatible with almost every TM-based AK AEG on the market, the RetroArms Precision CNC HOP-Up Chamber for AK AEGs is a fantastic upgrade option for performance-oriented AK build!

From £13.99
Was £69.99
Save £56.00
  • Complete Set
  • Aluminium Cylinder
  • For Many Types Of AEG

A complete upgrade Cylinder set for AEGs which includes: Cylinder, Piston, Cylinder Head, Piston head and Nozzle. Improve your air seal and shot for shot efficiency today for improved range and accuracy.

£319.99
  • HPA Engine for V2 gearbox
  • TITAN™ II V2 HPA Version required
  • For M4/AR-15, SMG-5 & G3 AEGs

If you're done with AEGs and want to revamp your build for HPA, the GATE PULSAR D Dual Solenoid HPA Engine is a fantastic option. Designed for Version 2 AEG gearboxes, the PULSAR D is designed to work with a GATE TITAN™ II V2 ETU (HPA Version), giving you unlimited advanced programming options along with the bob on consistency, top-tier accuracy, killer rate of fire and wealth of tuning opportunities HPA builds are known to provide.

The set includes the complete engine but will require a V2 gearbox shell, V2 trigger and TITAN™ II ETU HPA Version to complete the build. When compared to the original and more affordable PULSAR S, the PULSAR D offers a higher FPS range, universal compatibility with AEG nozzles, less precision required in the assembly of the build and impressively high air efficiency, using only 0.7 PSI per shot on average at 90 PSI with a 0.8L air tank.

The PULSAR D also has the edge in accuracy and versatility over the simpler single solenoid PULSAR S, being suitable for any build objective, from CQB monster to DMR dominator. As with all internal upgrades, we only recommend this engine to those who are confident working on AEG and HPA internals, but if you're ready for the PULSAR D, you're sure to be impressed!

£4.99
  • Spring steel construction
  • Complete spring set
  • For Version 3 gearboxes

If you love working on gearboxes or have a version 3 custom build on the cards, the FPS Softair Complete Gearbox Spring Set for V3 Gearbox belongs in your toolbox. This set includes all of the springs needed for a version 3 gearbox build, including the tappet plate spring, ARL spring, motor height spring, cut-off lever spring, trigger return spring and switch return spring.

All of the springs in this set have been manufactured by FPS Softair to be more durable than the original springs and with more precisely calculated tension for maximum efficiency. Whether you've lost a spring, are working on a version 3 gearbox build or need spares for your technical projects, the FPS Softair Complete Gearbox Spring Set for V3 Gearbox will be useful addition to your parts bin!

£9.99
  • Carbon fibre construction
  • Reinforced build
  • Strong yet flexible

FPS Softair brings us a Carbon Fibre Reinforced AEG Tappet Plate for use with version 2 gearboxes. It is specially formulated to be strong yet flexible enough to bend slightly.

The plate is constructed from extremely lightweight polycarbon and is designed to be attached to the air nozzle and sector gear. This process controls the feeding of BBs from the magazine into the hop up chamber.

£11.99
  • High impact resilience
  • CNC Ergal aluminium construction
  • For version 2 gearboxes

Upgrade your AEGs gearbox to improve shot consistency thanks to a better air seal. The cylinder head is constructed from CNC Ergal and is anodised with a smooth surface finish, precisely engineered so that the tolerance is not affected. Features powerful built in UREPAN bumper that absorbs the shock from the piston head.

This cylinder head is suitable AK47, AK74, KURZ / PDW, SIG, GALIL or any version 3 gearbox AEG and is compatible with ICS, Tokyo Marui, Classic Army, VFC and more. The hardness of the yellow rubber is 60 degrees shore, with a good balance between air seal and strength making it suitable for use in a custom DMR, as well as helping to protect the gearbox and reduce noise.

£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.

£29.99
  • CNC Aluminium construction
  • Adjustable pretravel & overtravel
  • Compatible with M4/AR-15 AEGs

If you want to add a more elite look to your M4 or you want a more snappy, responsive trigger, this should do the trick! The MAXX MODEL Advanced Speed Trigger for M4/AR-15 AEG; Type E is compatible with any M4/AR-15 AEG which uses a version 2 gearbox and is adjustable for both pretravel and overtravel, allowing you to cut out any unnecessary movement and lay down a hail of fire far more efficiently. 

The trigger is machined from a single piece of aircraft-grade aluminium using CNC processes, with a separate titanium pivot pin for maximum durability. The trigger shape is intended to provide a natural trigger position for the vast majority of hand sizes and has chamfered edges and three rubber pads to ensure comfort, enhance traction and provide positive control of the trigger. Either for use on its own or paired with an ETU/MOSFET, the Advanced Speed Trigger is ideal for CQB builds, DMR builds and others which prioritise trigger response!

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.