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7.49
  • Upgrade spring
  • Fits most Airsoft AEGs
  • Different strengths available

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!

7.49
  • Upgrade spring
  • Fits most Airsoft AEGs
  • Different strengths available

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
  • 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. 

10.99
  • TDC HOP-up kit
  • For G&G Rotary HOP-up units
  • HOP Arm, trolley, 2 x M-Nubs & centring unit

If you're running one of the newer G&G platforms with the G&G rotary HOP-up, check this out! The Airtech Studios TDC Conversion Set for G&G Rotary HOP-up Unit is intended to provide maximum performance from your original G&G rotary HOP-up unit. Designed specifically for the latest G&G rotary HOP-up design, this kit includes an enhanced HOP-up arm, TDC trolley, 2 x M-nubs and a centring unit.

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 modification to your original outer barrel to fit, but thankfully these mods are quite easy and thoroughly explained on the Airtech Studios website. If you want your G&G Rotary-equipped AEG to reach out and touch the enemy at crazy ranges, this TDC Conversion Set is what you need!

9.99
  • 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
  • Includes fitting screw
  • Great replacement part
  • For version 2 gearboxes

If you've had a cut-off lever failure or you like to keep parts on hand just in case the worst happens, the G&G Armament Cut Off Lever For V2 Gearbox is perfect. This is a replacement original part constructed from alloy, compatible with most version 2 gearboxes on the market.

The cut-off lever is a piece that sits between your trigger and sector gear and serves to interrupt or disconnect the trigger once your gearbox has made a complete cycle, very useful!

17.99
  • Steel construction
  • 18:1 ratio gearset
  • Compatible with version 2 and 3 gearboxes

For those working on a build which pushes the limits, you will require some decent gears! Introducing the VFC Avalon 18:1 Steel gearset, a standard ratio gearset constructed from hardened steel. The set includes a spur gear, sector gear, and bevel gear which are all precisely machined for perfect meshing and smooth, reliable performance.

These gears are tuned to an 18:1 ratio, which means for every 18 revolutions of your motor the gearbox will complete one full cycle. The benefit of using standard ratio gears is that you can make either a DMR or a high-rate-of-fire CQB beast without wholly committing to one or another, meaning you can adapt your build to the scenario which suits, and without overstressing the gearbox by running it considerably beyond its design parameters.

Treat your AEG to some premium gears and have it shooting consistently for a long long time, plus you have the flexibility of running a DMR one day, then alternating to a rapid-fire monster the next day!

5.99
  • 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.

5.99
  • Steel construction
  • Includes ARL & spring
  • For version 2 & 3 AEG gearboxes

If you're thinking of making a gearbox from scratch or you've had a disaster with your current anti-reversal latch or ARL spring, the VFC Anti Reversal Latch For V2 Gearbox will sort you out! This set includes a steel ARL and spring steel ARL spring, making this ideal for upgraded AEGs with strengthened gearsets.

The anti-reversal latch in your airsoft electric gun is responsible for preventing reverse motion of the gears, which could cause damage to your piston and gears if it happens during a cycle of the gearbox.

This Anti-reversal latch set is intended for version 2 gearboxes and is a great spare or repair to have in your toolbox for those who like a bit of DIY when their AEGs stop cooperating. If you've lost that awkward little ARL spring, this set offers an easy route to replacing it for relatively cheap too!

10.99
  • Shortens trigger travel
  • Super speedy semi-auto
  • For G&G M4/AR-15 AEGs

If you want to ramp up your semi-auto speed and you run a G&G, you need this! The Airtech Studios STC™ Speed Trigger Converter for G&G AEGs is designed to reduce trigger travel to a hair, allowing you to seriously spam semi in the most efficient way possible.

The STC is designed to fit a wide range of G&G AEGs (full compatibility list on Airtech Studios Website) and makes use of your original trigger, reducing trigger travel by 80%! This set will require opening the gearbox to install so we don't recommend it for newcomers. If you're a CQB player needing an edge, this will do it!

11.99
  • Polymer construction
  • For version 2 gearbox
  • Replacement part

The G&G Armament G2 Tappet Plate For V2 AEG is a 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 polymer 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.

It is compatible with almost every Version 2 gearbox on the market and comes with only the tappet plate.

15.99
  • 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.

7.49
  • Polymer construction
  • For version 2 gearbox
  • Lovely red colour

The VFC Tappet Plate For V2 Gearbox is designed for use with version 2 gearboxes. It is specially constructed with reinforced polymer to be strong yet flexible enough to bend slightly. The plate is extremely lightweight and is designed to be attached to the air nozzle and sector gear inside your Airsoft rifle. This process controls the feeding of BBs from the magazine into the hop-up chamber so they can be shot.

It is compatible with almost every Version 2 gearbox on the market and comes with only the tappet plate. If your primary is having issues and you need a Tappet Plate for repair, the VFC Tappet Plate For V2 Gearbox has you covered!

22.99
  • Replacement microswitch for ARCTURUS AEG V2 gearboxes
  • Pre-wired to Deans/T-plug battery connector and spade connectors
  • Fix up your worn-out AEG!

If you are having trigger issues with your ARCTURUS M4/AR15 AEG this replacement original part set should cure it! The ARCTURUS Microswitch V2 for ARCTURUS AEG series includes the microswitch itself, a Deans/T-plug battery connector and spade connectors all wired together for a relatively simple installation procedure. The set should not require soldering to install, but as always, we recommend a certain level of confidence and expertise if you plan on installing this part.

Fixed up your faulty platform and get it back on the battlefield in no time!

41.99
  • 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!

10.99
  • 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. 

14.49
  • Soft Bucking
  • Grippy Material
  • Air-Tight Design

A soft Hop Rubber for Marui compatible AEGs offering an air-tight design, which comes supplied with a nub and is a purple colour.

65.99
  • 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.

65.99
  • 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.

65.99
  • 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.

65.99
  • 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.

41.99
  • Stainless Steel
  • 6.03mm Tight Bore
  • Increased Performance

An upgrade Airsoft 6mm BB Gun inner Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units.

47.99
  • Stainless Steel
  • 6.03mm Tight Bore
  • Increased Performance

An upgrade Airsoft 6mm BB Gun inner Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units.

47.99
  • Stainless Steel
  • 6.03mm Tight Bore
  • Increased Performance

An upgrade Airsoft 6mm BB Gun inner Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units.

47.99
  • Stainless Steel
  • 6.03mm Tight Bore
  • Increased Performance

An upgrade Airsoft 6mm BB Gun inner Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units.

47.99
  • Stainless Steel
  • 6.03mm Tight Bore
  • Increased Performance

An upgrade Airsoft 6mm BB Gun inner Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units.

47.99
  • Stainless Steel
  • 6.03mm Tight Bore
  • Increased Performance

An upgrade Airsoft 6mm BB Gun inner Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units.

47.99
  • Stainless Steel
  • 6.03mm Tight Bore
  • Increased Performance

An upgrade Airsoft 6mm BB Gun inner Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units.

53.99
  • Stainless Steel
  • 6.03mm Tight Bore
  • Increased Performance

An upgrade Airsoft 6mm BB Gun inner Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units.

59.99
  • Stainless Steel
  • 6.03mm Tight Bore
  • Increased Performance

An upgrade Airsoft 6mm BB Gun inner Barrel which is compatible with Airsoft AEG Barrel Compatible Hop-Up units.

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.