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From £84.99
Was £89.99
Save £5.00
  • Highly Customisable
  • EU Series Magazines
  • Amazing Gas Efficiency

The Action Army AAP-01 Assassin GBB Pistol already has an almost cult following already, and for great reason! This Airsoft Pistol offers incredible performance (especially in cold weather), an absolutely massive backlog of compatible accessories and upgrades, accepts incredibly common EU Series Magazines and is sold at an amazingly competitive price. We may say this a lot, but trust us when we tell you that "you don't want to miss this."

From £84.99
Was £89.99
Save £5.00
  • Highly Customisable
  • EU Series Magazines
  • Amazing Gas Efficiency

The Action Army AAP-01 Assassin GBB Pistol already has an almost cult following already, and for great reason! This Airsoft Pistol offers incredible performance (especially in cold weather), an absolutely massive backlog of compatible accessories and upgrades, accepts incredibly common EU Series Magazines and is sold at an amazingly competitive price. We may say this a lot, but trust us when we tell you that "you don't want to miss this."

From £84.99
Was £89.99
Save £5.00
  • Highly Customisable
  • EU Series Magazines
  • Amazing Gas Efficiency

The Action Army AAP-01 Assassin GBB Pistol already has an almost cult following already, and for great reason! This Airsoft Pistol offers incredible performance (especially in cold weather), an absolutely massive backlog of compatible accessories and upgrades, accepts incredibly common EU Series Magazines and is sold at an amazingly competitive price. We may say this a lot, but trust us when we tell you that "you don't want to miss this."

From £154.98 Pack price
Bought separately £164.98
Save £10.00
  • Highly Customisable
  • EU Series Magazines
  • Amazing Gas Efficiency

The Action Army AAP-01 Assassin GBB Pistol already has an almost cult following already, and for great reason! This Airsoft Pistol offers incredible performance (especially in cold weather), an absolutely massive backlog of compatible accessories and upgrades, accepts incredibly common EU Series Magazines, and is sold at an amazingly competitive price. We may say this a lot, but trust us when we tell you that "you don't want to miss this."

£4.99
  • Spring steel construction
  • Enhanced recoil spring
  • For Action Army AAP-01 GBB pistol

If you are after an improvement in recoil force and cyclic rate from your Airsoft AAP-01 GBB pistol, an uprated recoil spring is a great way to get there! The 150% Recoil Spring from CowCow provides an increase in strength over the original recoil spring installed into the AAP-01 and should improve the rate of fire and provide a snappier bolt speed with a slight increase in recoil.

£4.99
  • Enhanced piston head
  • Improves gas efficiency
  • For Action Army AAP-01 Assassin GBB pistol

Building out your AAP-01 for use as a primary pistol? The CowCow Enhanced Piston Head can help improve the gas efficiency and add long term durability to the impressive AAP-01 platform. This part is constructed from oil-resistant rubber, meaning it will not absorb lubricant and expand, preventing cycling issues from developing over long term use. This part is an essential for anyone going for the absolute maximum performance possible from their AAP-01.

£6.99
  • CNC 6061 Aluminium construction
  • Heat gradation finish
  • Short stroke your AAP-01 for more speed

Is your AAP-01 not fast enough? The CowCow Aluminium Buffer for AAP-01 is designed to satisfy even the most ravenous appetite for speed! This set includes two recoil rod spacers which are CNC machined from 6061 aluminium to provide a great balance between strength, precision and low weight. Adding one or two of the spacers to your guide rod will reduce the length of travel of the AAP-01 bolt and speed up the already impressive cyclic rate of the AAP-01 in both semi-auto and fully automatic fire.

£8.99
  • Polymer construction
  • Enhanced nozzle for improved air seal
  • For Action Army AAP-01 Assassin GBB pistol

If you want your AAP-01 GBB to be running at its absolute best an enhanced nozzle would be a great choice to get the most out of this impressive platform. The CowCow Enhanced Plastic Nozzle is designed to improve the air seal performance and gas efficiency of the AAP-01, the result of which should be an increase in rate of fire and cyclic speed, with less wasted gas per shot. The set includes an enhanced loading nozzle for the AAP-01 GBB and the nozzle valve lock pin.

£11.99
  • For AAP-01
  • Ideal Spare
  • Loading Nozzle

A Polymer constructed Gas/Loading Nozzle for the Action Army AAP-01 Assassin Gas Blowback Airsoft Pistol, which is an ideal spare part to own, and is absolutely vital to the function of the Pistol. If you plan on using Full Auto a lot, then a Spare Nozzle is a must-have, as you don't want to be caught out come skirmish day.

£13.99
  • For AAP-01
  • Ideal Spare
  • Fix Gas Mags

A replacement or spare Outlet / Knocker Valve for the Action Army AAP-01 Assassin Pistol. If you own plenty of Magazines and want to keep them in tip-top condition, then you're going to want a few Knocker Valves spare in your arsenal. They are incredibly easy to install, provided you have an appropriate Valve Key on standby. You can use other tools to install them, but this is not recommended as you could damage the Valve.

£24.99
  • Aluminium guide rod with steel spring
  • Includes recoil rod buffers in "heat gradation" finish
  • For Action Army AAP-01 Assassin GBB pistol

If you want to add cyclic speed and recoil to your AAP-01 GBB pistol, CowCow has kindly put together a guide rod and recoil spring set to give your AAP-01 that additional "oomph" you seek! This set includes CowCow's aluminium recoil rod, finished in one of 5 colour choices, their 150% recoil spring and a set of recoil rod buffers finished in eye-catching and fashionable "heat gradation" colouration.

£29.99
  • CNC Aluminium construction
  • Available in either metallic red or black
  • Extended design for fast reloads!

If you would like your reload speed to increase in line with the speed of your AAP-01 pistol, an extended magazine catch will help get you there! Introducing the Action Army AAP-01 Aluminium extended mag release, a drop in replacement for your original polymer magazine catch which comes with an optional extension piece, intended to give you a split second increase in your reload times and allow easier access to the magazine catch when operating under pressure.

£34.99
  • CNC aluminium construction
  • Thumb rest for recoil control
  • For Action Army AAP-01 GBB pistol 

If you are in the process of adding some custom flair to your AAP-01, this part may be of interest to you! Introducing the Action Army Thumb Stopper for the AAP-01 Assassin GBB pistol, a "Gas Pedal" style thumb stop constructed from aluminium using CNC processes. This part is intended to provide additional recoil control and encourage a consistent grip by giving your thumb a place to rest, and letting you apply downforce to the muzzle to keep those full auto bursts under control!

£44.99
  • Extremely light
  • 50 round capacity
  • Compatible with EU series pistols and AAP-01

Introducing the Lightweight Green Gas Magazine from Action Army, a 50 round extended magazine for the much-lauded Action Army AAP-01 pistol and TM compatible EU series pistols. This magazine looks like something we have seen before, but at around half the weight! If you want an extended magazine but you don't want to ruin the balance of your pistol, this would be what you need!

£54.99
  • CNC Aluminium construction
  • Lightweight and robust
  • For AAP-01 Assassin GBB pistol


If you are looking to add a bit of extra strength to your AAP-01 without losing that insane cyclic rate, CowCow have just what you need! The Ultra Lightweight Blowback unit is CNC machined from 6061 aircraft-grade aluminium and replaces your original blowback housing and charging handle with a robust substitute in one of three beautiful finishes; discrete matt black, stylish matt metallic gold or in your face metallic red!

£79.99
  • AAP-01 NOT Included
  • Easy Installation
  • For AAP-01 Pistol

A hilarious and surprisingly accurate Body Kit for the AAP-01 Gas Blowback Pistol, that will make it look like a Power Drill from a well-known brand. This Conversion Kit will encase your Pistol in ABS body work, with a CNC Aluminium Outer Barrel that looks just like an oversized Drill Bit, and an extension for your Magazines to make them look like Batteries installed into the 'Drill'. Whether you're an absolute memelord, a serious tradesman or you just want to stand out from the crowd with your AAP-01 Pistol, then the AAP Drill Kit is just the ticket!

£2.99
  • Spring steel construction
  • Enhanced nozzle spring
  • For Action Army AAP-01 GBB pistol

If you are after an improvement in FPS and recoil force from your Airsoft AAP-01 GBB pistol, an uprated nozzle spring is a great way to get there! The 200% Nozzle Spring from CowCow provides double the strength of the original nozzle spring installed into the AAP-01 and should improve FPS and provide a snappier cyclic rate with a slight increase in recoil.

£7.99
  • Replaces Ironsight
  • 2'' Rail Segment
  • 20mm RIS / RAS


Designed to be fit onto the Action Army AAP-01 Gas Blowback Airsoft Pistol this rail works by replacing the rear ironsight with a 20mm RIS / RAS rail capable of attaching various aftermarket 20mm compatible dot and holographic Airsoft Sights. The rail allows you to configure the pistol to your needs, allowing you to add a dot / dr sight for quick target acquisition giving you a tactical edge over enemy players. The rail is constructed from heavy duty polymers and uses the existing screws which secure the rear sight in place.

This rail is perfect for those who have already purchased the AAP-01, or who are looking to do so in the future. We would highly recommend the rail to anyone who wants to take their pistol to the next level, or for those who use their pistol in CQB and want to attach an aftermarket sight.

£9.99
  • AAP-01 Pistol Rail Set
  • Front Lower Rail
  • Top Sight Rail


Designed to be fit onto the Action Army AAP-01 Gas Blowback Airsoft Pistol this rail set allows you to attach aftermarket sights, as well as various aftermarket attachments which are compatible with 20mm RIS / RAS Rails. The rails attach to the pistol using the existing mounting holes on the top and front lower of the pistol in its default configuration, allowing you to further personalise and customise the pistol to suit your needs. The rails are constructed from heavy duty polymers and come with all the screws required for fitting.

This set is perfect for those who have already purchased the AAP-01, or who are looking to do so in the future. This is a must have kit for anyone who regularly skirmishes with the gun in order to take it to the next level by allowing the attachment of red dot sights, holographic sights, grips, and for those that way inclined: launchers.

£12.99
  • Polymer construction
  • Complete nozzle set
  • For Action Army AAP-01 Assassin GBB Pistol

If you want your AAP-01 GBB to be running at its absolute best an enhanced nozzle would be a great choice to get the most out of this impressive platform. The CowCow Enhanced Plastic Nozzle Set includes an enhanced nozzle, nozzle valve, valve lock pin, valve spring and enhanced piston head, and when installed these parts should improve the shot to shot consistency, provide smoother cycling performance and improve the rate of fire of the AAP-01 Airsoft GBB.

£12.99
  • Reinforced fire pin lock
  • Stainless steel construction
  • For TM/WE EU series, AAP-01 and Umarex/VFC Glock

If you are looking for reliable long term performance from your EU series GBB pistol, AAP-01 Assassin or Umarex/VFC pattern Glock GBB pistol, CowCow are here to provide! This replacement fire pin lock is constructed from stainless steel using precise CNC machining and is polished using MAF polishing technology for smoother function with less friction. The stainless steel construction of this part prevents warping under heavy use, and guarantees reliable long term performance, assuming the rest of your pistol is working fine!

£14.99
  • For AAP-01
  • 14mm CCW
  • Shorten Barrel

This Alloy constructed Adapter is designed for the Action Army AAP-01 Assassin GBB Pistol, and serves to completely shorten your Outer Barrel, by replacing it with this Adapter. This will give you a 14mm CCW Thread right at the front of the Receiver, allowing you to create an incredibly compact Pistol.

£16.99
  • CNC aluminium construction
  • Left or right handed operation 
  • For Action Army AAP-01 GBB

The AAP-01 is quickly gaining recognition as one of the most efficient and skirmish effective GBB pistols on the market today. Its design allows many additional features to be added to improve the handling and performance which other GBB pistols can only dream about! One of these is the ability to add an extended charging handle to the pistol, allowing ultra-quick weapons manipulation to save you precious seconds when it matters! If you want an easier and faster reload process for your AAP-01, the Action Army CNC charging handle is a great way to do it!

£16.99
  • Ring charging handle
  • CNC machined aluminium construction 
  • For Action Army AAP-01 GBB

The AAP-01 is quickly gaining recognition as one of the most efficient and skirmish effective GBB pistols on the market today. Its design allows many additional features to be added to improve the handling and performance which other GBB pistols can only dream about! One of these additions is a "Ring" style charging handle, intended to provide an easy to grab alternative to the AAP-01's low profile charging handles. If you want to improve your AAP-01's handling and speed up your in game performance, the Charging Ring from Action Army is a great way to extend your lead over more conventional pistol users!

£19.99
  • Replacement hammer
  • Alloy construction
  • Stainless Steel finish

An upgraded hammer is a great foundation to any upgraded AAP-01 build, especially if you are an HPA user! The CowCow SS Hammer is CNC machined from strengthened alloy with a stainless steel finish, and MAF polishing technology is applied to its exterior surfaces to reduce friction between parts and ensure smooth operation of the pistol.

£24.99
  • 23rnd Capacity
  • For AAP-01 Pistol
  • Green Gas Magazine

This is a spare or replacement Gas Magazine for the Action Army AAP-01 Assassin Pistol, that holds a total of 23rnds and is based on the EU Series design. It is filled with BBs and Gas just like any other Pistol Magazine, using a Speedloader to feed BBs in through the feed lips, or holding down the follower to fill the BBs from the bottom of the Magazine. The Inlet Valve on the base of the Magazine is where you should insert your Green Gas bottle to fill it.

If you own an AAP-01 Assassin and want to spend more time dumping magazines on Full Auto, and less time fumbling around with a Speedloader, then you will need a backlog of Spare Magazines.

£24.99
Was £29.99
Save £5.00
  • Quick Lock Holster For AAP-01
  • Proprietary Design
  • Quickdraw

It's finally here boys! A Quick mount trigger guard locking holster for the popular Gas Blowback Pistol the AAP-01. 

£24.99
  • Adjustable speed trigger
  • CNC Aluminium construction
  • Adjustment ranges from standard pull to "hair" trigger

If you intend to get the best possible performance out of your AAP-01 we're sure you're already looking at adjustable triggers! The Action Army AAP-01 Adjustable Trigger sets itself apart due to its inclusion of the standard EU-style trigger safety which has been left out of many other speed triggers for the AAP-01. This means even with a short trigger pull you wont be able to fire a pistol with this trigger installed without first depressing the center section of the trigger! This piece is an essential if you want speed without any embarrassing and dangerous negligent discharges!

£36.99
  • 14mm CCW threaded
  • Aluminium Construction
  • Slim Suppressor design

For those in the market for a suppressor for their AAP-01 Assassin GBB pistol, or for that matter any pistol requiring a slim style suppressor, consider the DDW Suppressor from Action Army. This suppressor attaches to any 14mm CCW male thread and is a lightweight aluminium design with attractive vents and a foam filling for some suppression effect.

£44.99
  • Replacement hammer set
  • Stainless steel finish
  • For AAP-01 Assassin GBB

If you are working on your dream AAP-01 build you will want it to be performing to its maximum until the end of time. An upgraded hammer is a great way to improve your AAP-01's longevity and its resistance to wear. The CowCow SS Hammer Set is constructed from CNC machined alloy with a stainless steel finish and is highly polished for smooth operation with minimal friction.

Action Army AAP-01 GBB Pistols and Upgrade Parts - All things AAP!

The Action Army AAP-01 has taken the Airsoft world by storm and is rapidly gaining in popularity thanks to its flexible design which can be tricked out to look like almost anything you want, from a super slick tactical carbine with M4 furniture to a thoroughbred primary pistol for CQB skirmishes and Speedsoft events.

With impressive performance straight out of the box, the AAP is the up and coming choice for Speedsoft oriented players, and is enticing ever more players over to using a kitted out GBB pistol as a primary weapon for CQB; where size, handling and speed matter most. All the big names now make AAP-01 upgrade parts, from CowCow Technologies to Lancer Tactical, and of course, Action Army themselves who produce a range of CNC aluminium enhancements so you can get the most out of the AAP.

The AAP-01 has rightly earned a reputation for having an impressive rate of fire and superb gas efficiency thanks to its forward-thinking, performance-oriented design. Being compatible with standard Airsoft GBB/VSR HOP-up buckings and tightbore inner barrels provides the enormous accuracy potential of the platform. Those with a loadout full of EU series magazines will be happy to learn that the AAP boasts full EU Series magazine compatibility, from extended magazines to positively scary drum magazines!

As a design conceived for pure in-game performance, it would be a real shame not to take advantage of this and upgrade your AAP for domination in whatever role it finds itself in. Whether you use your AAP-01 GBB pistol as a traditional sidearm, linked up to HPA as a primary pistol or installed in one of the fantastic carbine kits available for the platform, you will find all the upgrade parts you need right here!