Viewing 180 of 313.
£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.

£3.99
  • 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.

£3.99
  • CNC Aluminium construction
  • Replacement original part
  • Compatible with CYMA CM.057 & Real Sword SVD

If you need a new nozzle for your CYMA CM.057 or Real Sword Dragonov SVD, CYMA has you covered! The Aluminium Nozzle for CYMA/Real Sword SVD/SVU is constructed from CNC machined aluminium and compatible with the CYMA CM.057 SVD/SVU AEG series and the Real Sword Dragunov SVD AEG. 

This is a replacement original part specifically designed for the Real Sword pattern SVD gearbox used in the CYMA CM.057 series and is not compatible with A&K SVDs or others. If you've built a beast of a DMR with your SVD and you want to get ahead of any potential parts failures this is a great part to have in the toolbox!

£4.99
  • Alloy construction
  • Compatible with Version 2 gearboxes
  • "Mil-spec" trigger shape

If you have worn out your AEGs trigger or you want the mil-spec look to replace your current trigger, this is perfect for you! The G&G Armament Trigger For V2 Gearbox is constructed from alloy with a textured finish and is patterned after the standard curved "Milspec" trigger found on the M4A1 rifle, MK18 MOD.0 and MOD.1, along with most other M4/AR-15 rifles used in military service in the real world.

The trigger is compatible with version 2 gearboxes which are found in the vast majority of M4/AR-15 AEGs. This means that the G&G Armament Trigger For V2 Gearbox trigger should work in practically any M4/AR-15 AEG but will require the gearbox to be opened for installation.

£6.99
  • 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.

£7.99
  • Stainless steel construction
  • Ribbed for reduced heat build-up
  • Fits CYMA/Real Sword SVD & CA/CYMA SR-25

If your CYMA CM.098 or CM.057 needs a revamp, the CYMA Stainless Steel Cylinder for CM.057 SVD & CM.098 SR-25 AEGs should be of use. This stainless steel cylinder is ribbed to promote heat dissipation and polished on the inside for minimal friction. 

This cylinder is a standard bore unported cylinder and is compatible with version 2 long gearboxes found in CA/A&K SR-25 AEGs and CYMA CM.098 SR-25 AEGs and also fits the Real Sword spec SVD gearbox used in the CYMA CM.057 SVD/SVU series and the Real Sword SVD Dragunov. 

£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.

£11.99
  • CNC Aluminium construction
  • Double O-Ring configuration
  • For CYMA CM.057 & Real Sword Dragunov

If you need a new cylinder head to fix up your Dragunov, check this out! The CYMA Aluminium Cylinder Head for CYMA/Real Sword SVD/SVU is constructed from CNC machined aluminium and is fitted with two O-rings to seal any gaps between it and the cylinder for perfect efficiency and minimal air loss. 

The cylinder head also has a sound dampening pad installed on the rear face which reduces gearbox noise and protects the piston head from the force of repeated impacts. A replacement original part for the CYMA CM.057 SVD/SVU series, this cylinder head is also compatible with the old Real Sword Dragunov SVD!

£13.99
  • Reinforced tappet plate
  • For version 3 gearbox - AK, AR36, AUG etc.
  • Important for high rate of fire builds

If you are tuning your gearbox for a high rate of fire build a reinforced tappet plate is a must for your shopping list. The Perfect Tappet Plate from Laylax replaces your original tappet plate to keep your AEG running for longer at high speed thanks to its reinforced polymer construction. 

£19.99
  • High strength, low weight
  • Polymer body and metal teeth
  • For Tokyo Marui NGRS SCAR-L/H

FPS Softair brings you the Polymer Piston w/Steel Tooth Rack for Marui NGRS SCAR-L/H, featuring a technopolymer body and a full rack of steel teeth for a good combination of high strength and low weight.

The loaded technopolymer assures great mechanical resistance and dimensional precision. The tooth 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.

The metal injected is SAE 4650 steel, currently considered the best for this type of use. 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 TM NGRS SCAR will have reliable and long-lasting functionality.

£22.99
  • Alloy V3 Gearbox shell
  • 8mm Bearing holes
  • For AK/AUG/AR36/SMG-5K AEG

Building a gearbox from scratch? You'll need a shell to get started! The ARCTURUS Version 3 Alloy Gearbox Shell is a reinforced design with a radiused cylinder window, additional material surrounding the cylinder for extra strength and 8mm bearing holes. The rear of the gearbox is also cut for a quick change spring guide. 

The version 3 shell is common to AK, AUG, AR36 and SMG-5K AEGs (not the regular SMG-5, though) so if you need a gearbox shell for any of these platforms this one will be compatible in most cases. 

£149.99
  • CNC 7075 T651 Aluminium
  • Steel QSC spring guide included
  • A Gearbox shell for the pros!

Redesigned for maximum compatibility with a wide variety of brands, the RetroArms CNC QSC Gearbox V2 is ideal for technical Airsofters working on a high-performance build which needs to last a lifetime. The set includes a Version 2 gearbox shell, carbon steel screws and a steel ball bearing spring guide and is ideally used for extremely high ROF or FPS builds. 

The shell itself is precision machined using CNC technology from the best aluminium around; 7075 T651, an ultra-hard alloy with similar strength properties to steel, boasting an ultimate tensile strength of 590 MPa compared to construction steel's 390 MPa. The quality of the machining simply cannot be overstated; every surface is flawlessly smooth and finished to perfection. 

Not content with making an absolutely beautiful gearbox from the finest materials around, the team at RetroArms has also put a lot of thought into the design aspect, improving on the original Tokyo Marui V2 gearbox in several areas. The piston tracks and selector plate rails have been redesigned for wider compatibility, the front of the gearbox is enlarged in every dimension to improve strength, "glue pockets" have been added around each bearing hole so they can be glued in and wider internal wiring routes for heavy gauge wiring, along with much, much more. If you're the techy type seeking a slick gearbox shell to start your build, the RetroArms CNC QSC Gearbox V2 is exactly that!

£1.99
  • For GATE MOSFETs
  • For MERF 3.2 & ACS
  • Low Resistance Wiring

A programming button designed to give you a bit more control of your GATE MOSFET, which is also compatible with other brands.

£4.99
  • Alloy construction
  • Replacement original part
  • For V6 Gearbox equipped Thompson AEGs

if you're looking for a replacement Motor Cage for your TM-spec Thomspon AEG, you've just found one! The CYMA Motor Cage for CM.033/051 Thompson AEGs is a replacement original part from the CM.033/051 series and should fit most Thompson and Aliens M41A Pulse Rifle AEGs on the market, assuming they are Tokyo Marui spec internally. The set includes both sides of the motor cage but doesn't include screws so make sure you have these ready for installation. 

£6.99
  • CNC POM Polymer
  • Internal O-ring
  • For TM spec. P90 AEGs

If you're looking for a strong and lightweight nozzle for your P90, check this out! The FPS Softair CNC POM Nozzle with O-ring for P90 AEGs is made from CNC POM polymer, a massive upgrade from the factory polymer nozzles present in TM P90s and clones. The nozzle also includes an internal O-ring to maximise air seal and its ultra-strong POM construction is ideal for high rate of fire or high FPS setups.

FPS Softair is a fantastic company, offering high quality upgrades for unbeatable prices, all designed and manufactured in Italy. The techs at FPS recommend lubricating the nozzle step of your piston head before installation using silicone lubricant. If you're working on a beast of a P90 build and want it ready for anything, the FPS CNC POM Nozzle with O-ring for P90 AEGs is what you need!

£7.99
Was £10.99
Save £3.00
  • Heat Resistant
  • Copper Contact
  • For Range of AEGs

A series of Selector Plates from Modify, which are available for a range of AEGs.

£10.99
  • Steel construction
  • Ball bearing equipped spring guide
  • For Sig Air MPX Submachine Gun AEG

If you are upgrading your MPX AEG, a ball bearing spring guide is a great way to reduce stress on the gearbox and spring, and prolong the life of your internals when operating in high-strain setups. The Laylax Ball Bearing Spring Guide is designed for the MPX and is a quick and easy replacement thanks to its quick change functionality.

The spring guide is constructed from steel, which alone will prolong its life considerably, but the ball bearings in its base allow the guide to spin freely and redirect any stress on the gearbox shell, and the spring itself.

£12.99
  • Standard speed motor
  • Pinion gear & spring included
  • Long shaft - For M4, G3, SMG-5 & P90 AEGs

If you've had motor issues and need a cheap replacement, here you go! The VFC Long Shaft Ferrite Motor is a standard-speed long shaft motor for M4/AR-15, SMG-5 (not K), G3 and P90 AEGs. The set includes a pre-installed O-type pinion gear and pinion spring, both of which are pre-installed on the shaft.

£12.99
  • High Torque motor
  • Perfect replacement part
  • Long shaft - For M4, G3, SMG-5 & P90 AEGs

If you've had motor issues and need a cheap replacement, here you go! The CYMA Standard Motor Long Shaft is a standard-speed long shaft motor for M4/AR-15, SMG-5 (not K), G3 and P90 AEGs. It is the perfect part if you're noticing some performance issues with your platform and the power is underwhelming. The set includes a pre-installed D-type pinion gear and pinion spring, both of which are pre-installed on the shaft.

£14.99
  • Increases Accuracy
  • Works with Heavier BB's
  • Compatible with Master Mod Barrels


Master Mods are a new Internal Parts manufacturer bringing a whole new meaning to the term reliable. The Master Mods R-Hop Contact rubber is a hardened contact for use with heavier weight BB's, increasing accuracy & performance.

£16.99
  • Steel construction
  • 4-Gear gear set
  • For CYMA CM.057 series & Real Sword SVD

If you've stripped a gear in your CYMA or Real Sword SVD, you're in luck! The CYMA Steel Gear Set for CYMA/Real Sword SVD/SVU is a replacement original parts set for the CYMA CM.057 SVD/SVU AEG series and should also be compatible with the Real Sword Dragunov SVD.

The gears are constructed from steel and come as a set of 4, replacing all gears inside the unique SVD gearbox. These gears are not compatible with the A&K Dragunov SVD, only the CYMA CM.057 series and the Real Sword Dragunov.

£19.99
Was £29.99
Save £10.00
  • Tempered
  • Stainless Steel
  • Installation Tools

A set of tempered Bushings from Modify which comes included with installation tools.

£34.99
  • Full cylinder group tune-up kit
  • CNC Aluminium & steel parts
  • Compatible with AR36 AEGs

If you're working on a long-barreled AR36 AEG build, whether it's a DMR or an MG36 LMG, the FPS Softair Full Tune Up Kit for AR36 AEGs is the ideal addition to your build. This kit includes replacements for the full cylinder group, enhancing air seal, and improving longevity and overall efficiency.

The kit is optimised for inner barrels of 451-550mm in length and includes a Type F CNC Steel Cylinder, ERGAL Nozzle with O-ring, CNC Aluminium cylinder head and a CNC ERGAL Double O-ring ball-bearing advanced piston head. If you're looking for maximum efficiency and strength from your long-barreled AR36 build, you need this kit!

£34.99
  • Tracer HOP-up unit
  • Works with red & green tracer BBs
  • Compatible with most AK / V3 Gearbox AEGs

If you want glowing BBs without making your primary any longer or fitting some bulky, slightly ugly, tracer unit, the CYMA Tracer HOP-Up Chamber for AK AEGs is a great choice! This alloy rotary HOP-up chamber integrates a tracer module, just like more expensive alternatives with the option to use red or green tracer BBs. The set includes everything you need to complete the HOP-up chamber build, including the bucking and nub.

This unit is powered by your AEG's battery through the balance cable, meaning it will only work with LiPo batteries unless you have something home-brewed in mind. The set includes 3 sets of wiring for use with 7.4V LiPo, 11.1V LiPo or custom battery solutions, all of which connect to the pre-wired connector on the HOP-up unit itself.

While it is designed for use with the CM series of AKs, this unit should work with most AKs on the market, however, potential modifications will be required to fit certain brands. Depending on your specific platform, fitting may also require modification to your receiver. As such, we only recommend this unit for those who are comfortable working on AEG internals. If this sounds like you, why not shave off length and weight from your classic Russian primary with the CYMA Tracer HOP-Up Chamber for AK AEGs!

£39.99
  • 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. 

£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.

£43.99
  • Semi Only MOSFET/ETU
  • Adjustable pre-cocking
  • Compatible with M4/AR-15 AEG with V2 gearbox

If you are looking for an easy way to make your Airsoft platform exclusively a DMR or CQB beast, this is worth checking out! The Delta Armory Programmable ETU Processor Unit for V2 Gearbox; Semi Only replaces your conventional trigger assembly and offers semi-automatic fire only with adjustable pre-cocking, which can be programmed in using the fire controls of the AEG itself. 

This ETU should fit most M4/AR-15s which use a version 2 gearbox, but we only recommend this part for experienced techs and those in the know when it comes to Airsoft internal upgrades. The ETU is also pre-wired to a Deans/T-Plug battery connector in rear wired configuration and spade connectors for your motor, so you shouldn't need your soldering iron!

£0.50
  • Large Tamiya connector
  • Gun end or Battery end
  • Useful spares for a tech

The Patrol Base Large Tamiya Connector is an essential spare to have if you are the techy type of Airsofter who cannot resist customising their kit, but could also be useful for anyone who participates in RC hobbies. The set includes the connector and the outer plastic shroud, and is available as either a set to mount to your gun (Gun end) or a set to mount to your battery (Battery end).

£2.99
  • Replacement trigger contacts
  • For Specna Arms AR36 AEG series
  • Replaces worn out trigger contacts

If you are having trigger trouble with your Specna Arms AR36 AEG, the solution is here! This unit is a replacement original part for the SA-G series of AR36 AEG rifles and will require disassembly of the gearbox to install, and soldering, as such it is only recommended for experienced techs and advanced users.

£6.99
Was £9.99
Save £3.00
  • Upgrade spring
  • 100 m/s - 328 FPS
  • For TM PSG-1 only

This Guarder upgrade spring is compatible with the Tokyo Marui PSG1 gearbox and provides approximately 100 m/s or 328 FPS muzzle velocity on a 0.2g BB. The spring is made from tempered Si-Cr alloy steel wire to provide the strength and resistance necessary.

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.