My Cart
0
You have no items in your shopping cart.

Need Help?
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:?
Includes:?