Description
The GHK high-speed high-cycle bolt and spring set is designed to be a drop-in upgrade set that supercharges your GHK M4 GBBR. The bolt carrier group is ultra-lightweight and the spring strength is perfectly in tune to ensure a rapid cycling response with every pull of the trigger!
Compatibility:
GHK M4 Series GBBRs
Includes:
x1 GHK M4 GBB High Cycle & Speed Bolt Kit – Black
x1 Buffer
x1 Spring
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