Action Army AAP-01 Assassin GBB Pistol

Action Army
  • 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."

Full description


Whether you want to accept it or not, a Polymer Green Gas Pistol always works better than an Alloy one, and that is one of the reasons why this Pistol is such a winner in our eyes. It is based on the EU Series Platform so that Magazines will always be widely available (and you won't need extra magazines if you already own an EU Series), and this also makes it compatible with a wide range of accessories, such as Stock Adapters and Drum Magazines. The other major benefit of this Platform is its' Ambidextrous nature. The Slide Release is present on both sides of the Pistol, and the Magazine Release can easily be swapped over to better suit a Left Handed Player.

The Pistol is constructed from a very heavy duty Polymer that feels great in the hands, and brings the Pistol to a total loaded weight of ~0.6kg. The Pistol Grip has an ergonomic design, and again, closely replicates the shape and feel of the EU-Series. So much so, that the Backstraps and Stock Adapters of the EU-Series will work with this Pistol. The Outer Barrel has a fluted design that looks incredible, and also features a 14mm CCW Thread underneath the Thread Protector at the end, allowing you to install Suppressors and Tracer Units. A set of Light Enhancing Ironsights are installed on the Pistol out of the box, which will capture light and make them easier to see in darker environments. The Frame features a Trigger Lock Safety which can be pushed through to block the Trigger, and has a red outline so that you can easily see when it is not engaged. The Slide and Frame both feature Threaded Slots to accept Action Army 20mm Rails, made specifically for this Pistol. This allows you to take your customisation to another level and really make this Sidearm your own.

The AAP-01 Assassin is very reminiscent of classic varmint Pistols, and requires the Cylinder at the rear of the Slide to be pulled back to 'cock/charge' the Gun. When the 'Slide/Cylinder' is locked to the rear, you can look on the underside and access the Fire Selector, which can be switched between Semi and Full Auto. The Full Auto function yields around 950rpm, which essentially makes it a pocket-sized MP9. To remove the Slide you only need to push the large button on the rear of the Frame, and the Slide Assembly will lift off the frame. From here you can make adjustments to the Hop Unit to apply backspin to your BBs, and theoretically improve range and consistency, when paired with the right BB weight and settings.

The Action Army AAP-01 is the Pistol for the ideal choice those of you who want to take an absolutely solid-performing platform and modify it until it is barely recognisable. If you're looking for a dependable backup to help you get through the winter months, or you want to flex on everyone with your stunning Full Auto and hilarious amount of accessories, then the AAP-01 may be just the thing you were looking for.


  • Gas Blowback Pistol
  • Nylon Fiber Externals
  • Excellent Gas Efficiency
  • Takes EU Series Magazines
  • 14mm CCW Threaded Barrel
  • Fluted Outer Barrel Design
  • Light Enhancing Iron Sights
  • Knurled Thread Protector
  • Push-Through Safety
  • Incredible CQB Airsoft Gun
  • Ambidextrous Slide Release
  • Mag Release Can Switch Sides
  • Accepts EU-Series Backstraps
  • Accepts EU-Series Stock Adapters
  • Accepts Action Army 20mm Rails
  • Easy Field Stripping / Disassembly
  • Massively Customisable
  • Semi / Full Auto Functionality
  • 23rnd Gas Magazine
  • Unique Pistol Grip Pattern
  • Awesome Winter Pistol
  • Ideal Backup Airsoft Gun
  • Can Hold Its Own as Primary Gun

Package Includes

  • Action Army AAP-01 Assassin GBB Pistol
  • 23rnd Gas Magazine

Special Instructions

Please ensure you have at least some HOP applied when using the Pistol, otherwise the BB will fall out the barrel when you cycle it.



Weapon Construction External
Weapon Type
Over 18 Only Icon
Over 18
Icon UKARA - United Kingdom Airsoft Retailer Association
Defence / UKARA Required
Yes, No,
FPS Icon
FPS (Feet Per Second), using 0.20g BB
Approx. 329fps ± 10%, using 0.20g BB
Site Legal Icon
Site Legal, using 0.20g BB
Screwdriver Icon
Included Items
  • Magazine
  • Instruction Manual
Skill Level Icon
User Skill Level
Regular Player

Weight and Dimension

Weight KG Icon
Weight (KG)
Approx. 0.672kg
Weapon Length Collapsed
Length (Collapsed)


Colour Wheel Greyscale
Primary Colour
Black, Tan ,
Black / Tan
Black / Tan
Tan / Black
Tan / Black
Colour Wheel Greyscale
Secondary Colour
Black, Tan ,
Two Tone Icon
Pre Two-Toned
Construction Icon
Full Polymer Externals, w/ Alloy Magazine and Internals
Weapon Construction External
External Construction
Gearbox Icon
Internal Construction

Weapon Specific

Power Source Icon
Powered By
Green Gas
Blowback Icon
Gas Blowback
Weapon Platform
Magazine Style Icon
Magazine Style
EU Series
Fire Select Icon
Fire Selector
Patrol Base | Fire Select - Semi Automatic
Semi Automatic
Patrol Base | Full Automatic
Full Automatic
Weapon Safety Features Icon
Safety Features
Trigger Lock
Shooter Configuration Icon
Shooter Configuration
Weapon Configuration Icon
Weapon Configuration
Weapon Scale Icon
Weapon Scale
Suggested BB Weight


Hop-Up Unit Icon
Hop-Up Unit
Hop-Up Unit Adjuster Icon
Hop-Up Adjuster
Hop-Up Unit Location Icon
Hop-Up Location
Press button on back of frame to release upper portion of pistol and access HOP


Weapon Furniture Icon
  • Light Enhancing Iron Sights
  • Threaded Outer Barrel
  • Fluted Barrel
  • Ambidextrous Slide Release
Sight Type Icon
Sight Type
Light Enhancing Open Iron Sights
Sling Plate Icon
Sling Options
Lanyard Loop


Icon Thread Type
Outer Barrel Thread Type
Icon Thread Direction
Outer Barrel Thread Direction
CCW (Counter Clockwise)
Outer Barrel Thread Size
Inner Barrel Length

Magazine Specific

Magazine Type
Magazine BB Capacity
Approx. 23 Rounds
Magazine BB Fill Method
Speed Loader
Magazine BB Fill Location
Top, Bottom,
Magazine Gas Fill Location
Magazine Gas Type
Green Gas

Gas Gun Specific

Gas Can Icon
Gas Compatability
Green Gas
Gas Can Icon
Gas Recommendation
Green Gas

Pistol Specific

Construction Icon
Slide Material

Product Testing Data

Notepad Icon
Test Description
Notepad Icon
Tested Using
ASG Blaster 0.20g BBs & ASG Ultrair
Notepad Icon
Test Date

Detailed Power Tests

FPS, using 0.20g BB
Approx. 329fps, using 0.20g BB

Need ideas for something extra?

Like this Airsoft Gun? Check out these awesome Products!