JP Enterprises Complete Bolt Carrier Assembly With Jpbc-7 Large Frame Variable Mass Carrier Jpeb-308 Jp Enhanced Bolt Jp Enhanced Cam Pin Black

JP Enterprises AR-10 Variable Mass Operating System Bolt Carrier Group w/ .308 EnhancedBolt The EnhancedBolt(TM) is compatible with the JP LRP-07(TM) and the DPMS LR-308 platforms (or clones thereof) only and cannot be used to replace bolts in the Armalite AR-10 platform (or clones thereof). Requires DPMS-pattern bolt, firing pin and cam pin. Package includes carrier, EnhancedBolt(TM) assembly, cam pin, firing pin, firing pin retainer pin and instruction sheet. The large-frame VMOS(TM) 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 and should be used only with a Silent Captured Spring. Because our Law Tactical Folder Silent Captured Springs require use of a buffer retainer plunger to work, they are also not compatible with this VMOS(TM) bolt carrier. Enhanced tunability of operating system Guaranteed reliability of difficult configurations Overcomes all fouling build-up Roller-burnished bore for frictionless operation Rock-hard QPQ finish provides remarkable natural lubricity Extremely smooth cycling with proper lubrication Increased bearing surfaces for slower wear and longer component life Longer cocking pad for optimal reliability Additional forward assist serrations for one full inch of travel Made in specialized factories