CowCow 140% Hammer Spring For TM EU Series GBB Pistol

Code: CCT-TMG-005
  • 140% Hammer spring
  • Improves recoil and slide speed
  • For Tokyo Marui EU series GBB Pistol

Looking for more recoil from your EU series GBB pistol? Installing a stronger hammer spring should do the trick! This 140% Hammer Spring from CowCow replaces the original hammer spring in your Tokyo Marui based EU series pistol and provides additional force for each hammer strike, releasing more gas and providing higher FPS and improved recoil and slide speed! This part is constructed from high strength spring steel and is hard-coated to prevent corrosion.

Full description



  • Spring steel construction
  • Hard coated for corrosion resistance
  • Improves recoil and slide speed
  • Raises FPS slightly by providing more gas flow
  • For Tokyo Marui based EU series GBB pistols

Package Includes

  • CowCow 140% Hammer Spring For TM EU Series GBB Pistol



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


Colour Wheel Greyscale
Item Colour
Construction Icon
Spring steel
Internal Part Construction
Spring Steel

Part Specific

Part for Power Source Type
Weapon Platform
  • EU-Series
  • Pistol
Package Includes
Hammer spring

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.