GHK M4 GBB Enhanced Blowback Recoil Spring

The GHK M4 GBB enhanced blowback recoil spring is designed to be a robust and stiffer option to the stock spring found in the gun.  For best effect, this spring is best paired with the GHK high-speed buffer and bolt set, but it can also work with standard stock bolt carrier groups compatible with GHK M4s as well. 

Compatibility: 

• GHK M4 Series GBBRs 

Includes: 

• x1 GHK M4 GBB Enhanced Blowback Recoil Spring

Disclaimer: All aftermarket upgrade parts require necessary skill or modification to install and assemble, please consult with your airsoft technician if needed.