CowCow Enhanced Piston Head For AAP-01 Assassin GBB Pistol

Code: CCT-AAP01-005
  • 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.

Full description



  • Oil resistant rubber construction
  • Improves gas efficiency
  • Provides less shot to shot FPS variation
  • Designed to withstand repeated high pressure impacts
  • Compatible with the Action Army AAP-01 Assassin GBB pistol

Package Includes

  • CowCow Enhanced Piston Head For AAP-01 Assassin GBB Pistol



Internal Part Type
Piston Head
Patrol Base - Warning Icon
Patrol Base - Warning Icon
Parts Fitting


Colour Wheel Greyscale
Item Colour
Construction Icon
Oil resistant rubber
Internal Part Construction

Part Specific

Part for Power Source Type
Weapon Platform
  • Pistol
  • AAP-01
Package Includes
Piston Head

Size guide

Parts Fitting

Upgrades and Downgrades should only be undertaken by experienced players, or Airsoft Technicians. Please note, changing any internal parts of a weapon voids its warranty unless done in-house by our staff. 

Please ensure that when fitting parts the part purchased is the correct part, as once a part has been fitted we cannot accept return.

We do know that players love to tinker, so we're here to give you help should you require it, and if needed you can get in touch with our workshop for more help!

Unique Parts

Please note that some parts may be unique to a specific brand of weapon. For example: Parts for an ASG M4A1 may not fit an ICS M4A1.

Parts from the same brand typically have a high chance of fitting, though be warned, some replicas use unique parts, so please ensure the part will fit before you attempt to fit it.

If you require help with fitting any parts feel free to get in touch with us via our Contact Us Page.

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