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£9.99
  • CNC stainless steel
  • For AEG version 2 & 3 gearboxes
  • Improved performance

Upgrade your M4/M16 AEG. with an FPS Softair Stainless Steel Cylinder and increase its reliability and performance. The cylinder has a high strength and is resistant to fatigue with increased durability. The cylinder is made for use with version 2 or 3 gearboxes, compatible with Tokyo Marui derived designs, with barrel lengths of 451 to 550mm.

£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!

£24.99
  • Upgrade kit for M4/M16
  • For AEG version 2 gearboxes
  • Increased efficiency and power

Upgrade your M4/M16 AEG. with an FPS Softair Tune Up Kit and increase its reliability and performance. The high-quality O-Rings ensure that it eliminates air leak and gives you perfect air seal for maximum efficiency and power. Constructed from Ergal (Aluminium 7075), the cylinder head has high strength and is resistant to fatigue and is made for use with version 2 gearboxes, compatible with Tokyo Marui derived designs.

This tune-up kit includes:

  • Cylinder Head (TC02E)
  • Air Nozzle with O-Ring for M4/M16 (SPM4E)
  • Double O-Ring Ball Bearing AEG Piston Head Advanced Type (TPAVN)

This product increases the performance of your AEG.

£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 for version 2 gearbox variants of M4, M16, SR16, MP5, MC51, G3, M249 and LR300 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.

£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!

£7.99
  • Aluminium construction
  • Consistent performance
  • Compatible with V2 gearboxes

The G&G Armament G2 21.20MM Aluminium Nozzle For AEG is an excellent replacement piece for your Airsoft AEG. It is constructed from aluminium which improves performance and consistency, plus, it is durable and has a longer lifespan compared to polymer nozzles.

If you're building a gearbox from scratch or have some repairs to carry out, the G&G Armament G2 21.20MM Aluminium Nozzle For AEG is a handy spare to have around just in case. Compatibility-wise, this nozzle is designed for version 2 gearbox-equipped M4/AR-15 AEGs and has an overall length of 21.20mm.

£5.99
  • 4 Different lengths
  • Easily adjust your AEGs FPS
  • Reinforced polymer construction

The Airtech Studios Set of 4 Spring Shims;11mm Inner Diameter are designed for most VFC, Krytac & ASG spec spring guides. These reinforced polymer shims slide onto the spring guide and add additional tension to the existing spring within the gearbox. The different sizes of shim add different amounts of FPS to your replica. The smallest shim adds roughly 5 FPS to your replica and the largest adds roughly 20 FPS. The shims are designed to be of various sizes so that you can combine them and find the optimal FPS increase to keep your replica within site limits.

These shims give you an easy way to increase your platform's FPS without having to have multiple springs. Simply add or remove the shims as and when you need to adjust your AEGs FPS, with minimal hassle!

£10.99
  • Improves air seal and efficiency
  • CNC aluminium Ergal construction
  • Double O-ring and ball bearing set

Upgrade your AEGs piston head to improve air seal and increase the efficiency of airflow through the cylinder. This piston from FPS Softair has ports on the front to push out the O-ring as it moves forwards, this ensures that all of the air in the cylinder is being pushed out to propel the BB.

Constructed from CNC aluminium Ergal, which has been anodised, the piston head features a smooth precise surface. The piston head has ports on the front to push out the O-ring as it moves forwards, this ensures that all of the air in the cylinder is being pushed out to propel the BB.

The ball bearings help reduce tension created by the spring compressing and expanding, this combined with a ball bearing spring guide is the optimal set up to keep your spring in good shape.

This is the most advanced version with 8 ventilation holes for higher speed and rate of fire, double O-ring and ball-bearing. This head is designed for version 2 and 3 gearboxes but may fit other types.

£13.99
  • Reinforced polymer
  • Increase RPS and improve FPS consistency
  • Pull Stronger springs without piston/rack damage

Take your AEG to the next level with a revolutionary Piston. It has been redesigned to ensure a premium performance. The Nightstalker piston has eradicated all the common weaknesses of an AEG piston to create an almost flawless design. Firstly, it has been constructed from a reinforced polymer, one that can pull stronger springs without causing damage to itself. It also has a drop-in angle of engagement (AOE) which helps distribute the force evenly on the teeth of the piston rack, reducing the risk of premature wear or breakage.

The stress points of the piston have been revised to spread the wear between 3 contact points and drastically reduce the load on each tooth. Another upgrade is that the piston rails have been revised to reduce friction, this removes the wobbling of the piston against the gearbox and keeps it completely straight. All these revisions and enhancements make for a consistent improvement in FPS and performance. Make your AEG premium, for real.

£34.99
  • Programmable MOSFET
  • Burst mode, binary, trigger sensitivity
  • For Version 2 gearboxes

If you want to turn your M4, SMG-5, G3 or other V2 gearbox-equipped platform into an advanced space gun, the Double Eagle FALCON 2.0 Programmable MOSFET for V2 Gearbox should do the trick! This is the same FALCON EFCS system installed in Double Eagle's superb M90x range, including the UTR45, UTR556 and AX//15 rifles. Once installed, the FALCON offers a wide range of programmable fire mode options along with adjustable trigger sensitivity and the usual improvements in rate of fire and trigger response a MOSFET provides. 

Available fire modes include 1-5 round burst, binary trigger (fire on trigger pull and on release), and 3 levels of trigger sensitivity, from a super short hair trigger to a more realistic full trigger pull. The FALCON will also warn you of any electrical anomalies by vibrating your motor 3 times and cutting off power to protect itself and will also cut power if your battery is running too low, indicating with 5 motor vibrations. The only thing the FALCON doesn't do is shoot the AEG for you!

£69.99
  • Steel construction
  • 16:1 High-speed gearset
  • For AEG with V2/V3 gear compatibility

If you are looking to further extend your advantage and push your AEG to the limits reinforced gears are a must for long term reliability under increased stress. This Laylax EG Hard Gear Set is specifically designed for Airsoft AEGs with a version 2 or version 3 gearbox, or compatibility with v2/3 gearsets and includes a hardened steel spur gear, sector gear and bevel gear. This gearset is a high speed set with a ratio of 16:1, intended to provide a slight speed increase with the same motor compared to the standard 18:1 gears in most AEGs.

£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.

£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!

£5.99
  • TDC kit
  • Includes 2 x M-nub
  • For Gate EON CNC HOP-up chamber

Designed specifically for the Gate EON CNC Rotary HOP-up chamber, the Airtech Studios Full Upgrade Set for Gate EON HOP-up Chamber includes a TDC trolley, 2 x M-nubs and an inner barrel centring unit. This set is designed to convert the Gate EON into a true TDC unit, giving you more range and accuracy than ever before!

The benefits of a TDC HOP-up unit include a stronger HOP-up effect and less chance of side-to-side shot deviation when using heavy BBs at high FPS. This part will require a certain amount of expertise to install but thankfully, the process is fully explained on the Airtech Studios website. If you want to get the most out of your Gate EON HOP-up chamber, this kit will do the trick!

£10.99
  • 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. 

£24.99
  • Pinion & bevel gear set
  • Helical gears - Experts only!
  • For version 2 & 3 gearboxes

If you're the techy type and are seeking a smooth, buttery-sounding gearbox with maximum efficiency, helical gears must be on your shopping list! The Lonex Spiral Bevel Gear & Helical Pinion Gear for V2/3 Gearbox includes a pinion gear and bevel gear, both constructed from steel for maximum strength. The included pinion gear is an "O type", designed for O-type motor shafts and not compatible with D-type shafts. 

These gears differ from standard bevel and pinion gears in the angle of the teeth, cut in a helix shape and designed to increase torque and efficiency. This also means the gearbox report will be far quieter with these installed, though strong bushings are recommended for the bevel gear due to the increase in axial thrust force generated. Naturally, this set is ideally used by a techy skirmisher with the prerequisite knowledge needed to bring out the best performance and longevity from their setup. 

£24.99
  • 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.

£5.99
  • 4 Different lengths
  • Easily adjust your AEGs FPS
  • Reinforced polymer construction

The Airtech Studios Set of 4 Spring Shims;10mm Inner Diameter are designed for most Tokyo Marui spec spring guides. These reinforced polymer shims slide onto the spring guide and add additional tension to the existing spring within the gearbox. The different sizes of shim add different amounts of FPS to your replica. The smallest shim adds roughly 5 FPS to your replica and the largest adds roughly 20 FPS. The shims are designed to be of various sizes so that you can combine them and find the optimal FPS increase to keep your replica within site limits.

These shims give you an easy way to increase your platform's FPS without having to have multiple springs. Simply add or remove the shims as and when you need to adjust your AEGs FPS, with minimal hassle!

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

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

£24.99
  • Rotary adjustment wheel
  • High-density polymer HOP-Up chamber
  • Designed for M4/AR-15 AEGs with V2 gearboxes

If you are having HOP-up troubles with your M4 platforms, don't worry, G&G has just the thing for you! This HOP-up chamber is a replacement part and comes with the necessary pieces for installation, but does not include a HOP-up rubber or a nub. The main chamber is made from high-density polymer and is compatible with all M4-style AEGs which have V2 Gearboxes. It's a reliable and high-quality replacement part that will help your AEG shoot like brand new again!

The rotary adjustment dial is the latest and greatest way of setting your rifle's HOP. It is much more accurate and provides finer increments of adjustments when compared to previous gear-style HOP-up adjustments.

£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!

£174.99
  • CNC Aluminium housing
  • Titanium shaft assembly
  • Pinion gear & spring included

If you're working on the ultimate AEG build, the Warhead Industries Ronin CNC Brushless Motor; Long Shaft should be on your shopping list! Outdoing even the legendary Warhead CNC Black brushless motors used by Bolster Armouries, the Ronin is the absolute pinnacle of AEG motor technology, boasting improved quality magnets, a titanium shaft assembly, hard-wired spade connectors and a weight-reduced rotor. 

"Ronin" means a wandering Samurai, a reference to the Warhead Industries stator winding master, a single expert with over 20 years of winding experience who hand winds each Ronin motor personally. While the CNC Black motor also has a hand-wound stator, this is done by regular line workers and while precise, cannot match up to the efficiency and quality of the expertly wound Ronin. 

If you want your AEG shooting at its absolute best and maintaining it in the long run, the Warhead Industries Ronin CNC Brushless Motor is essential. Naturally, such a high-performance motor will require expertise to run properly and other reinforced parts to keep up. If you're the techy type and require the best brushless motor on the market, this is it!

£12.99
  • Polymer piston
  • Steel teeth
  • CNC and anodised piston head

If you are looking for a replacement piston for your Real Sword or CM.057 variant SVD, then CYMA has come to the rescue! The CYMA SVD/SVU Piston and Head Set includes the piston itself, a piston head and a piston head O-ring. The piston has a full 18-tooth rack of steel teeth, improving strength while keeping overall weight manageable, making it great for high-performance SVD builds.

The piston is constructed from durable polymer and the piston head from CNC anodised aluminium. The piston head features vents to improve tightness and has a rubber pad to help absorb the shock from impact when the platform is fired. The piston head also has a bearing within it to improve the spring action of your SVD replica.

The set is designed exclusively for the Real Sword or Cyma variants of the SVD and is NOT compatible with other brands' SVD platforms.

£6.99
  • Carbon fibre-reinforced polymer
  • Strong and flexible
  • Ideal for high RoF builds and DMRs

If you're working on a high-speed or high FPS gearbox, the FPS Softair Carbon Fibre Reinforced Tappet Plate for V3 Gearbox is essential. This hard-wearing tappet plate is constructed from carbon fibre-reinforced polymer, making it strong and flexible in equal measure. We've had superb results installing the Version 2 equivalent of this tappet plate in Bolster Armouries builds and if you seek similar performance we would wholeheartedly recommend this plate over others.

This Carbon Fibre Tappet Plate is compatible with any version 3 Airsoft gearbox, including those found in AUG, AR36, AK & S55x AEGs. Whether you're building a DMR or a beast of a high-speed setup, the FPS Softair Carbon Fibre Reinforced Tappet Plate for V3 Gearbox is the ideal upgrade to keep it feeding!

£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.

£11.99
  • Convert the stock HOP-up chamber
  • For ASG Scorpion EVO SMGs
  • Includes all parts for TDC conversion

Turn your stock ASG Scorpion EVO's HOP-up chamber to a TDC design without having to replace the whole unit. This kit includes everything you need to install the system into your current HOP-up chamber. It is compatible ONLY with ASG Scorpion EVOs and will not fit in any other HOP-up systems.

TDC (Top-Down-Centre) HOP units are incredibly sought after due to the increased friction they add to BBs, which increases the effectiveness of the HOP applied to your BBs. By installing TDC to the stock HOP-up you are guaranteed compatibility with the platform.

The set also includes rubber nubs, these ensure the HOP is stable while BBs accelerate through the unit, further improving the performance and consistency of your ASG Scorpion EVO. This is a very complex installation process and we only recommend it if you are confident in your understanding and ability to fit it to your HOP-up chamber.

£29.99
  • Perfect Upgrade
  • Alloy Hop-Up Unit
  • No Loose Movement

A replacement Hop-Up Unit for Airsoft AK Rifles, designed and constructed to high standards by Action Sports Games in Denmark as part of their Ultimate Upgrade Parts Range. 

£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. 

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.