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£5.99
  • Upgrade spring
  • Fits most Airsoft AEGs
  • Different strengths available

Made In The UK

Springs are the perfect upgrade for an instant FPS boost! They fit in most standard AEGs and have a relatively simple installation process. Many rifles these days have some sort of quick-change spring system which makes your life even easier when upgrading your rifles.

The Bolster Armouries Premium AEG Spring is the best of the best when it comes to internal springs. These are the same springs used in our Bolster Armouries rifles, that's just how premium these springs are! If you want your rifle shooting like a Bolster Armouries ONYX, then the Bolster Armouries Premium AEG Spring is certainly a step in the right direction!

£5.99
  • Upgrade spring
  • Fits most Airsoft AEGs
  • Different strengths available

Made In The UK

Springs are the perfect upgrade for an instant FPS boost! They fit in most standard AEGs and have a relatively simple installation process. Many rifles these days have some sort of quick-change spring system which makes your life even easier when upgrading your rifles.

The Bolster Armouries Premium AEG Spring is the best of the best when it comes to internal springs. These are the same springs used in our Bolster Armouries rifles, that's just how premium these springs are! If you want your rifle shooting like a Bolster Armouries ONYX, then the Bolster Armouries Premium AEG Spring is certainly a step in the right direction!

£5.99
  • Upgrade spring
  • Fits most Airsoft AEGs
  • Different strengths available

Made In The UK

Springs are the perfect upgrade for an instant FPS boost! They fit in most standard AEGs and have a relatively simple installation process. Many rifles these days have some sort of quick-change spring system which makes your life even easier when upgrading your rifles.

The Bolster Armouries Premium AEG Spring is the best of the best when it comes to internal springs. These are the same springs used in our Bolster Armouries rifles, that's just how premium these springs are! If you want your rifle shooting like a Bolster Armouries ONYX, then the Bolster Armouries Premium AEG Spring is certainly a step in the right direction!

£4.99
  • Rubber construction
  • Replaces the HOP-up unit spring
  • Provides superb air seal

If you're the techy type and want to maximise your AEG's efficiency, the Bolster Armouries HOP-up to Barrel O-Ring Shim Set belongs in your toolbox! This set includes 10 o-rings designed to fit around the HOP-up unit and inner barrel, forcing it back to meet the gearbox as seamlessly as possible to promote maximum efficiency and reduce shot-to-shot FPS deviation.

This set is designed to replace the "one size fits all" HOP-up unit spring, providing a user-customisable solution to account for manufacturing tolerances. While this will take a bit of trial and error to get the perfect fit for your AEG it should prevent airseal qualities from reducing over time and avoid that annoying realisation that you forgot to reinstall the HOP-up spring after upgrading or maintenance!

The Bolster Armouries HOP-up to Barrel O-Ring Shim set should fit almost every AEG on the market and you probably won't need to use the full set, meaning you might even be able to replace two HOP-up springs with a single set.

£8.99
  • Spring steel construction
  • M95, M100 or M105 Strengths
  • For TM NGRS Gearboxes

If you're tuning up your TM NGRS, the FPS Softair Upgrade Spring for Tokyo Marui NGRS will be useful! Available in M95, M100 or M105 strengths, this spring will work in any Tokyo Marui NGRS gearbox, including M4 variants, the 416, SCAR-L and H.

The FPS Softair Upgrade Spring is made from carbon steel wire (EN10270 / 2) with silicone and chrome additives and is heat-treated to extend its lifespan. We recommend pairing this upgrade spring with upgraded bushings, an upgraded spring guide and a ball bearing piston head to maximise reliability. If you're going for higher FPS in your NGRS build, the FPS Softair Upgrade Spring for Tokyo Marui NGRS is what you need!

£9.99
  • Steel construction
  • 12mm CW to 14mm CCW
  • For Umarex KWA/VFC MP7

If you're decking out your MP7 and need a tracer or suppressor, check this out! The Airsoft Artisan 14mm CCW Thread Adapter for KWA/VFC/Umarex MP7 is made from steel, offering 14mm CCW male barrel threads, so you can make use of the most common tracer units and suppressors on the market.

This adapter works with both the KWA and VFC OEM Umarex MP7s, both AEG and GBB flavours, mounting to the 12mm CW male threads beneath the flash hider. If you're going silent with your MP7 but don't want to use the H&K QD Suppressor, this is the adapter you need!

£29.99
  • Alloy construction
  • OEM Replacement part
  • For Specna Arms SA-H EDGE 2.0 series

If you've had a mishap with your Specna Arms SA-H EDGE 2.0 AEG, this might be the part you've been searching for! The Specna Arms Lower Receiver for SA-H Series EDGE 2.0 AEGs is an original replacement part made from alloy, a stripped lower receiver ideal for replacing a cracked, damaged or broken lower.

The set includes a pre-installed fire selector switch and trigger guard but doesn't include body pins or other trim parts. Bring your EDGE 2.0 back to life with the Lower Receiver for SA-H Series EDGE 2.0 AEGs from Specna Arms!

£64.99
  • High torque motor
  • Great replacement/upgrade part
  • For M4/AR-15, P90, SMG-5 & G3 AEGs

If you're looking for a great way to spice up your build, the NUPROL High Torque Long Shaft Motor is a great shout. This motor is a high-torque motor and is ideal for DMR builds requiring stronger springs and CQB builds seeking improved trigger response, but it could also give most AEGs a significant ROF boost!

This version is the Long Shaft model, designed for M4/AR-15, P90, SMG-5 (not the -K model) and G3 AEGs and includes a pre-installed D-type pinion gear constructed from steel. The pinon spring is also included, and the motor is pre-wired for spade connectors, meaning there is no need to break out the soldering iron to install it. If you're looking for a snappier trigger, building a DMR or seeking an increase in rate of fire, the NUPROL High Torque Long Shaft Motor is a great option!

£7.99
  • CNC Steel construction
  • For TM NGRS (excluding MK46)
  • Essential for reliability

If you have big plans for your TM NGRS platform, the FPS Softair CNC Steel 5.9 mm Bushings for TM NGRS belong inside! These robust steel bushings are specifically designed for Tokyo Marui NGRS (Next Generation Recoil Shock) gearboxes, providing the strength necessary to cope with high-power springs, high-speed motors, and other upgraded internal parts.

Compatibility-wise, these bushings will work in all TM's current NGRS lineup other than the MK46 LMG, which uses proprietary bushings. Whether your NGRS is being upgraded for DMR work, high rate of fire, or you just want it to last forever, FPS Softair's CNC Steel 5.9 mm Bushings for TM NGRS are what you need!

£8.99
  • Steel construction
  • Standard ratio gearset
  • For Version 2 & 3 gearboxes

If you've got an old AEG to repair, CYMA's 18:1 Steel Gear Set for V2/3 Gearbox might be the fix you need! This standard ratio gearset is made from steel and compatible with any version 2 or version 3 gearbox-equipped AEG. Being a standard 18:1 ratio set, these gears will turn once for every 18 motor revolutions, giving you a great balance between speed and torque.

£6.49
  • CNC ERGAL build
  • Inner O-ring - Maximise air seal
  • Fits V3 gearbox AK-47/74 AEGs

If you're upgrading your AK-47/74 AEG, the FPS Softair ERGAL Air Nozzle with Inner O-Ring for AK-47/74 AEG is an essential part! Made from super-strong CNC-machined ERGAL, this nozzle is about as strong as AEG nozzles get, ideal for high-performance builds intended to last.

ERGAL is the trade name for 7075 aluminium alloy, known for its exceptional strength and low weight, rivalling some steels in strength while staying light as a feather by comparison. This nozzle also features an internal O-ring designed to minimise air leaks for maximum consistency and ensure the nozzle stays perfectly aligned for reliable feeding with every shot. If you need a super strong nozzle for a high-performance AK AEG build, you won't find any better than the FPS Softair ERGAL Air Nozzle with Inner O-Ring!

£16.99
  • Teeny Tiny size
  • Compatible with most AEGs
  • Protects trigger contacts and improves ROF

This is the smallest Airsoft MOSFET on the market! It grants you a better rate of fire and trigger response, as well as protecting the mechanical trigger contacts in your AEG, as electrical currents bypass them and go straight to the motor. The MOSFET is so compact that it can be fitted to pretty much any Airsoft AEG.

It attaches to the wiring of your gun and will require some expert knowledge and skills to fit. Make sure you know what you're doing before installation! Also included in the package is a heat shrink, so you can keep this MOSFET safe after you have installed it.

£6.49
  • CNC ERGAL build
  • Inner O-ring - Maximise air seal
  • Fits V2 gearbox SMG-5/MP5 AEGs

If you're building out your MP5/SMG-5 AEG for high performance, the FPS Softair ERGAL Air Nozzle with Inner O-Ring for MP5/SMG-5 AEG will ensure it's reliable and accurate! Made from super-strong CNC-machined ERGAL, this nozzle is about as strong as AEG nozzles get, ideal for high-performance builds intended to last.

ERGAL is the trade name for 7075 aluminium alloy, known for its exceptional strength and low weight, rivalling some steels in strength while staying light as a feather by comparison. This nozzle also features an internal O-ring designed to minimise air leaks for maximum consistency and ensure the nozzle stays perfectly aligned for reliable feeding with every shot. If you need a super strong nozzle for a beastly MP5/SMG-5 AEG build, the FPS Softair ERGAL Air Nozzle with Inner O-Ring is the way to go!

£6.49
  • 2 Meter length
  • 1.7mm Diameter
  • Improve RoF & trigger response

Designed to improve conductivity for a boost in rate of fire and trigger response, FPS Softair Low Resistance Wiring is ideal for custom builders seeking the slickest, most efficient setup possible. This wiring is supplied in a 2-meter length and is 1.7mm in diameter, making it ideal for AEG wiring, even in setups with relatively small wiring routes. If you're the techy type, FPS Softair Low Resistance Wiring should be in your parts stash!

£14.99
  • High-density polymer
  • Rotary adjuster
  • For LCT LCK/AK AEGs

If you need better accuracy from your LCT AK AEG, this should do it! The LCT Rotary Hop Unit for AK AEG is designed for LCT AK replicas (LCK range) but may fit other brands, though we cannot guarantee off-brand compatibility currently.

This new HOP-up design brings the rotary adjuster style to the AK platform, offering reduced side-to-side shot deviation, improved setting retention, and finer adjustment increments. Like the original slider unit, this rotary accepts standard TM AEG spec HOP-up buckings, nubs and inner barrels.

£64.99
  • High Torque motor
  • Great replacement/upgrade part
  • Short shaft - For AR36, AK-47/74, AUG and SG55x AEGs

If you've had motor issues and need a reliable replacement, here you go! The NUPROL High Torque Short Shaft Motor is an upgraded high torque motor for M4/AR-15 AEGs. This is the perfect upgrade part if you want to crank up your trigger response for some snappy semi-auto work or increase torque to handle high-power springs. The set includes a D-type pinion gear and pinion spring, both of which are pre-installed on the motor shaft.

£1.99
  • 2 Meter Length
  • AWG 24 Gauge
  • Chrome-plated capillaries

If you're the techy type seeking high-quality MOSFET wiring, FPS Softair has your back with the High Conductivity MOSFET Signal Cable! Made with 19 pure copper capillaries coated in chrome to enhance conductivity, this signal wire is specifically designed to provide maximum efficiency while avoiding being too thick and impinging on gearbox internals. We all know the pain of discovering your pinion gear has shredded your wiring. Thankfully, this FPS Signal Wire sidesteps this issue entirely!

The capillaries are protected with an FEP (Fluorinated Ethylene Propylene) coating, keeping the wire flexible to be routed through tight spaces, ideal for whatever custom setup you have in mind. If you're an ambitious tech with some wild custom build plans, FPS Softair High Conductivity MOSFET Signal Cable will definitely come in handy!

£4.99
  • Reinforced polymer
  • Ensures reliable feeding
  • For M14 AEGs/Version 7 gearbox

If you're building out your M14 AEG, add the SHS Reinforced Tappet Plate for Version 7 Gearbox to keep it feeding reliably! This reinforced polymer tappet plate is designed for Version 7 gearboxes, making it a sure fit in most M14 AEGs and potentially compatible with other V7 gearbox-equipped designs.

The strong polymer construction of this tappet ensures your platform feeds reliably, even at high speed or in high FPS DMR builds. If you want your M14 to last the ages, this reinforced tappet plate belongs inside!

£6.49
  • CNC ERGAL build
  • Inner O-ring - Maximise air seal
  • Fits Cybergun/VFC SCAR-H AEGs

If you're upgrading your Cybergun/VFC SCAR-H, the ERGAL Air Nozzle with Inner O-Ring for VFC SCAR-H AEG from FPS Softair is essential for reliability and accuracy! Made from super-strong CNC-machined ERGAL, this nozzle is about as strong as AEG nozzles get, ideal for high-performance builds intended to last. Compatibility-wise, this nozzle is designed specifically for the VFC-manufactured SCAR-H (sometimes branded Cybergun) and may also fit D-Boys SCAR-H AEGs, but won't work with other SCAR-H replicas.

ERGAL is the trade name for 7075 aluminium alloy, known for its exceptional strength and low weight, rivalling some steels in strength while staying light as a feather by comparison. This nozzle also features an internal O-ring designed to minimise air leaks for maximum consistency and ensure the nozzle stays perfectly aligned for reliable feeding with every shot. If you need a top-of-the-range nozzle for your VFC SCAR-H custom build, the FPS Softair ERGAL Air Nozzle with Inner O-Ring for VFC SCAR-H AEG is ideal!

£109.99
  • CNC Aluminium construction
  • Realistic Zco markings
  • For A&K PKM Machine Gun AEG

If you're modernising your A&K PKM and need an optical sight on board, the Airsoft Artisan B51 20mm Picatinny Optics Mount for A&K PKM is the way to go. Made from flawlessly machined aluminium with realistic laser-engraved markings, this optic mount is designed specifically for the A&K PKM Machine Gun, offering a 19-slot 20mm Picatinny rail at 12 o'clock, ready for your choice of optical sight.

Styled after the real steel Zco B51 rail, this optics mount is significantly skeletonised, keeping weight to the bare minimum as the PKM is heavy enough by itself! Whether you're working on a modern Russian Armed Forces loadout or you run a PKM for its iconic looks, the Airsoft Artisan B51 20mm Picatinny Optics Mount for A&K PKM is a game changer!

£8.99
  • Progressive Coiling
  • Coloured Rating Tip
  • SiCr Zinc Coated Steel

Produced to an incredibly high quality with the best mil-spec steel rated SiCr. Every spring no matter the rating has gone through a full quality control test by ASG for your peace of mind that you are fitting a reliable spring.

£54.99
  • CNC Aluminium & POM construction
  • Various O-rings included
  • Rotary style adjuster - M4/AR15 AEG & HPA compatible

If you are building out your M4/AR15 AEG for maximum performance the Gate EON HOP-up unit is probably already on your list! This precise HOP-up unit is constructed from CNC machined aluminium and is a rotary style unit which applies pressure directly to the top of the HOP-up rubber/nub to minimise side-to-side deviation.

This unit is compatible with M4/AR15 AEGs and can also be used with HPA setups thanks to the included nozzle sleeve which perfectly centres the nozzle for maximum efficiency.

£54.99
  • CNC Aluminium & POM construction
  • Various O-rings included
  • Rotary style adjuster - M4/AR15 AEG & HPA compatible

If you are building out your M4/AR15 AEG for maximum performance the Gate EON HOP-up unit is probably already on your list! This precise HOP-up unit is constructed from CNC machined aluminium and is a rotary style unit which applies pressure directly to the top of the HOP-up rubber/nub to minimise side-to-side deviation.

This unit is compatible with M4/AR15 AEGs and can also be used with HPA setups thanks to the included nozzle sleeve which perfectly centres the nozzle for maximum efficiency.

£54.99
  • CNC Aluminium & POM construction
  • Various O-rings included
  • Rotary style adjuster - M4/AR15 AEG & HPA compatible

If you are building out your M4/AR15 AEG for maximum performance the Gate EON HOP-up unit is probably already on your list! This precise HOP-up unit is constructed from CNC machined aluminium and is a rotary style unit which applies pressure directly to the top of the HOP-up rubber/nub to minimise side-to-side deviation.

This unit is compatible with M4/AR15 AEGs and can also be used with HPA setups thanks to the included nozzle sleeve which perfectly centres the nozzle for maximum efficiency.

£31.99
  • Complete V2 Gearbox
  • Fits most M4/AR-15 AEGs
  • SHS Piston & reinforced tappet plate
This gearbox is now wired to a Deans connector. Product images will be updated shortly to reflect this.

If your M4 needs a revamp, a new gearbox is the easiest way to do it. The Delta Armory Complete Version 2 Gearbox for M4/AR-15 AEG is compatible with almost every M4/AR-15 AEG on the market and is well-equipped with reinforced parts straight out of the gate.

This is the same gearbox used in the Delta Armory CHARLIE™ line AEGs, boasting a quick change spring guide, 18:1 steel gears running on 8mm bushings, an SHS piston with a full steel tooth rack, an SHS reinforced tappet plate and a reinforced gearbox shell with radiused cylinder window corners.

The pre-installed spring will provide around 380 FPS when installed, so if you plan to use this gearbox for anything other than a semi-auto-locked DMR build you will need an M100, M105 or weaker spring to keep it within site limits. Thankfully, the quick change spring system makes spring swaps a breeze! Whether you are breathing new life into an old M4 AEG or you are building an AEG from scratch, this complete gearbox will save you loads of time and messing around!

£12.99
  • 6.02mm Precision barrel
  • Stainless steel construction
  • AEG Barrel cut - Fits most Airsoft AEGs

If you want to improve your AEGs accuracy, range and consistency, a barrel upgrade is a great start! The Specna Arms 6.02mm Steel Tightbore Inner Barrel promises to be an improvement even over stock 6.03mm brass tightbore barrels and its stainless steel construction makes it far more rigid and less prone to bends than other brass and aluminium barrels.

This barrel is cut for standard Airsoft AEGs and should fit most of them, though we suggest referring to the product description of your gun to find out what length you need. The standard AEG barrel cuts mean you can use this precision barrel with standard AEG HOP-up buckings, HOP-up nubs and HOP-up units, meaning all your existing parts should fit and plenty of opportunities to pair this barrel with other accuracy upgrades. If accuracy is a priority for you this upgraded barrel is a must!

£15.99
  • 6.02mm Precision barrel
  • Stainless steel construction
  • AEG Barrel cut - Fits most Airsoft AEGs

If you want to improve your AEGs accuracy, range and consistency, a barrel upgrade is a great start! The Specna Arms 6.02mm Steel Tightbore Inner Barrel promises to be an improvement even over stock 6.03mm brass tightbore barrels and its stainless steel construction makes it far more rigid and less prone to bends than other brass and aluminium barrels.

This barrel is cut for standard Airsoft AEGs and should fit most of them, though we suggest referring to the product description of your gun to find out what length you need. The standard AEG barrel cuts mean you can use this precision barrel with standard AEG HOP-up buckings, HOP-up nubs and HOP-up units, meaning all your existing parts should fit and plenty of opportunities to pair this barrel with other accuracy upgrades. If accuracy is a priority for you this upgraded barrel is a must!

£6.99
  • Piston, piston head & O-ring
  • For version 2 & version 3 gearbox
  • Full steel tooth rack - Very strong

If you are looking for a replacement piston on the cheap with no performance compromises, CYMA to the rescue! The CYMA Steel Tooth Piston Set w/Piston Head includes the piston itself, a piston head and a piston head O-ring. The piston has a full 15-tooth rack of steel teeth, improving strength while keeping overall weight manageable, making it great for high performance builds. The set is designed for version 2 and version 3 gearboxes and will be provided in a random colour; either blue or green.

£23.99
  • USB Link for TITAN and ASTER
  • Program your AEG settings with your phone or PC
  • Compatible with TITAN and ASTER equipped AEG with Deans

If you want to unlock more functionality from your Gate ASTER or TITAN MOSFET, the USB Link from Gate is exactly what you're after! This dongle attaches to your AEGs Deans battery connector and allows you to connect it via micro-USB or USB Type C to your Android device, Windows PC or Mac and control diagnostics, trigger sensitivity, burst modes, rate of fire adjustment and all the other fantastic features built into the ASTER and TITAN ETUs. Unlock the full potential of your Gate TITAN or ASTER and give yourself the edge in battle!

£129.99
  • Complete V2 gearbox
  • Compatible with M4/AR-15 AEGs
  • Quick change spring, ETU/MOSFET & high torque motor

If you have had a gearbox failure and you don't fancy opening it up, the CYMA Complete Version 2 Gearbox w/High Torque Motor & ETU is a pre-upgraded and pre-wired replacement which can be installed with minimal effort and no need to solder or open the gearbox shell. As always, we recommend you have some technical experience before installing a new gearbox, but when it comes to Airsoft upgrades this is about as easy as they get.

This gearbox set is designed for M4/AR-15 AEGs and has the correct nozzle length and selector plate for the task and is also pre-wired to a Deans connector so you can benefit from a lower resistance connector for increased electrical efficiency. Also included with the set is a CYMA high torque Neodymium magnet motor, providing a very snappy trigger response and the power to handle stronger springs than a standard motor.

The icing on the cake is the pre-installed MOSFET/ETU which prevents gearbox lock-up on semi-auto, provides further improvements to the trigger response and a boost to the rate of fire. If your M4 gearbox has issues or you want to freshen up an old M4 with a brand new and pre-upgraded gearbox this set would be a fantastic choice, avoiding the messing around and getting you back to shooting with minimal effort!

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.