GHK AR V3 Hammer Spring

For GHK M4 V3 GBB system.
For GHK M4 V2 GBB system to upgrade. (V3 hammer spring is required to use with V3 valve knocker.)
Required for use with Steel Valve Knocker V3 


The AR V2 and V3 system have the same hammer, only equipped with a new, reinforced hammer spring.

Specifications:
● Product Brand : GHK 
● GHK Original Parts
● For GHK M4 GBB
● Material : Unkown Alloy