JP Enterprises FMOS Enhanced High Pressure Bolt Carrier Group for .308 Winchester. Full-mass JPBC-5 carrier engineered to improve reliability in suppressed firearms, SBRs, and rifles without adjustable gas systems. Heavier than standard DPMS LR-308 carriers to provide cycling delay for dependable performance in specialized setups. Features forward assist serrations and compatibility with DPMS and Armalite LR-308 platforms.