JP Enterprises Complete JPBC Bolt Carrier Group (BCG)

Full Mass Operating System For police duty or any application where absolute reliability is the main criteria, our 416 stainless steel Full Mass Operating System (FMOS) carrier design is the top of the line. The JPBC-2 has every strength an operator expects from a Mil-spec. carrier matched up with improvements born from decades of shooting and engineering experience. Heavier than a standard .308 carrier, our large-frame JPBC-5 is the solution for rifle needing more mass regulation. Designed with extended forward assist serrations and a dust cover notch, our FMOS carriers also feature a 100% increase in bearing surface for smoother operation, improved alignment and lower wear in the upper receiver as well as a longer Mil-spec. cocking pad for optimal reliability. Just as critical as the design is the robust finishing process of the FMOS carrier, which receives a roller-burnish of its bore for frictionless operation, eliminating the peeling chrome common to standard Mil-spec carriers. Then, the exterior bearing surfaces are polished before the carrier undergoes our state-of-the-art, multi-vendor QPQ (Quench-Polish-Quench) process that results in a rock-hard surface with remarkable natural lubricity. This is hands-down the best designed and highest quality general purpose carrier on the market, and when properly lubricated, a JP operating system will make your rifle feel like it’s cycling on ball bearings. JP Low Mass Operating System For the no-compromise competition rifle, our Low Mass Operating System (LMOS) offers the most significant improvement in the felt impulse of the rifle compared to any modification other than the addition of a compensator. By reducing the reciprocating mass within the operating system, the bolt velocity is increased while simultaneously reducing the overall impulse experienced by the shooter with each shot. Consequently, LMOS equipped rifles have virtually no reciprocating mass feel and move less during cycling, allowing for much faster sight recovery and follow-up shots. While use of the LMOS components is recommended only for competition and sporting use, this is only precautionary as their reliability is excellent, particularly on rifles with adjustable gas systems. Like all our bolt carrier designs, LMOS carriers feature a 100% increase in bearing surface for smoother operation, improved alignment and lower wear in the upper receiver as well as the longer Mil-spec. cocking pad for optimal reliability. In fact, Team JP shooters have been using the LMOS system for over a decade without any reported operating system malfunctions at a match, and most every shooter that implements this operating system feel that it is proven to be a great performance improvement. Some shooters have even reported fewer unexplained flyers in their groups after switching to the LMOS system. For small-frame rifles, the complete JP LMOS system consists of one of our low mass bolt carriers and our lightweight buffer conversion kit, but any LMOS component can be installed individually in your existing setup and run smoothly. Specifications for JP Enterprises Complete JPBC Bolt Carrier Group (BCG): Manufacturer: JP Enterprises Fabric/Material: Stainless Steel Cartridge: .308 Winchester Gun Model: AR-10 Gun Frame Size: Large Hand: Right Condition: New Bolt Material: 9310 Steel Carrier Material: 8620 Steel Caliber: .308 Caliber Package Contents: JP Enterprises Complete JPBC Bolt Carrier Group