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.
Compatibility and Usage:
Non-ferrous specialty carriers should be considered consumable rather than lifetime parts. The JPBC-8 yields a performance advantage for competition applications at a price. Your usage and maintenance will determine the duty life of your carrier. Frequent and generous oiling will extend lifespan.
The JPBC-8 is a competition/race gun part only and is not recommended for any duty/defense use where absolute reliability is required. This carrier is also not recommended for SBR or suppressor use.
This carrier should also be run with an adjustable gas system to minimize stress on the entire bolt carrier assembly.
The large-frame VMOS™ carrier uses the same steel and tungsten weights as GEN 2 Silent Captured Spring units. Only the forward two masses are reconfigurable. The rear-most steel mass cannot be exchanged. This carrier should not be run stripped (i.e., without any masses).
This carrier will not cycle with a standard buffer retainer plunger installed. Standard buffer/spring components must be installed “loose” or replaced with a Silent Captured Spring.
This carrier is not recommended for use with gas systems shorter than mid-length for longest service life. Use with carbine or shorter gas systems may result in gas erosion in the tail stock area and subsequent leakage and reduced service life.
To help avoid the instance of slamfires, this bolt carrier comes packaged with a titanium firing pin. We strong encourage use of a titanium firing pin with this carrier to ensure safety.
Use of a hammer with a radiused leading edge such as our JP Speed Hammer is recommended.
Use with a Silent Captured Spring assembled with a lighter weight spring will produce superior results.
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