JP VMOS Aluminum Variable Mass Bolt Carrier

Like our small-frame JPBC-1, this carrier is the ultimate game gun operating system, now available for your heavy metal rig. The JPBC-8 offers an extremely light recoil impulse with minimal sacrifice in reliability.
The JPBC-8 also pulls from the advances of our JPBC-7 Variable Mass Carrier. This standard version of the aluminum large-frame VMOS™ carrier includes three steel weights, two of which can be exchanged for heavier tungsten weights.
Requires DPMS-pattern bolt, firing pin and cam pin.
This carrier also includes our Enhanced Gas Ring for perfect gas seal and a low-friction relationship between ring and carrier bore.
Package includes carrier, titanium firing pin, JP Enhanced Gas Ring and instruction sheet.
Patent Pending

Features:
Enhanced tunability of operating system
Faster sight recovery and follow-up shots
Increased bearing surfaces for slower wear and longer component life
Longer Mil-spec cocking pad for optimal reliability
Included Enhanced Gas Ring provides perfect bore-to-gas seal fitment and minimized friction/carrier wear
Included titanium firing pin eliminates possibility of slamfires at higher bolt velocities
Full-length forward assist serrations
American made