CMMG AR15 9MM ENHANCED BOLT CARRIER GROUP Mk9
Complete 9mm AR15 BOLT CARRIER GROUP. The drop-in carrier/bolt assembly is ramped on the bottom to provide clearance for a factory .223/5.56mm hammer in your 9mm conversion. Eliminates the need to install a dedicated 9mm hammer, so the original fire control system stays intact for easier conversion back to original caliber. Precision machined from high-grade ordnance steel, the one-piece design combines bolt and carrier as a single unit to provide outstanding strength, durability, and reliability. Includes a staked-on carrier key.
SPECS: Steel, black oxide finish. Fits rifles and carbines with Rock River Arms and Colt-style 9mm blow back system.
JP JPBC-9MMA JP Enhanced 9mm AR15 BOLT CARRIER GROUP
JP JPBC-9MMA JP Enhanced 9mm AR15 BOLT CARRIER GROUP is machined to the same exacting tolerances as our bolt carriers, this second generation 9mm bolt assembly is an entirely new design that eliminates the need for a central mass (slug) to readily function with our 9mm JP Silent Captured Spring without compromising bolt weight and reliability. In fact, when combined with our JPSCS-9MM, you have the heaviest, most reliable 9mm operating system that dramatically reduces bolt bounce while improving accuracy.
This bolt assembly is .9 oz. heavier than the Rock River Arms 9mm bolt with its central mass removed. When used in conjunction with the Silent Captured Spring, the complete JP 9mm operating system is slightly heavier than the complete RRA bolt and buffer, some of the bolt mass having been transferred to the SCS in our system.
JP JPBC-9MMA JP Enhanced 9mm AR15 BOLT CARRIER GROUP Features
Reduced stroke length for faster firing impulse when used with JPSCS-9MM
Designed for optimal function with JPSCS-9MM for a heavier operating system that reduces bolt bounce while improving reliability and accuracy
Tighter firing pin channel to reduce pin wear
High-energy tumble process offers a finer cosmetic finish
Includes firing pin and retainer pin
JP JPBC-9MMA JP Enhanced 9mm AR15 BOLT CARRIER GROUP Compatibility
The JPBC-9MMA is compatible with both Colt SMG-style magazines and Glock pistol magazines.The JPBC-9MMA is also compatible with our JP side-charging uppers.