The Faxon Superfinished .458 SOCOM / .450 Bushmaster Bolt Carrier Group is engineered for big-bore AR-15 platforms where reliability, strength, and smooth operation are critical. Built to handle the increased pressures and recoil impulse of large-caliber cartridges, this BCG goes beyond standard MIL-SPEC with upgraded materials, inspection, and finishing processes.

At the core is a 9310 tool steel bolt that is fully heat treated, shot peened, and Magnetic Particle Inspected (MPI) to ensure structural integrity under demanding conditions. The S7 tool steel extractor, combined with a Crane O-ring and enhanced spring system, delivers consistent extraction even with high-pressure loads and fast cycling. :contentReference[oaicite:0]{index=0}

The entire assembly is treated with a salt bath nitride finish, increasing surface hardness, improving corrosion resistance, and reducing friction compared to traditional phosphate finishes. Faxon’s Superfinish process further enhances smoothness, reducing fouling and promoting reliable cycling in hard-running big-bore systems. :contentReference[oaicite:1]{index=1}

Designed with chamfered bolt lugs to improve feeding and durability, this BCG maintains consistent function even under rapid fire or heavy recoil conditions. The M16-pattern carrier is full-auto compatible and features properly staked gas keys with Grade 8 fasteners for long-term reliability.

Whether you are building or upgrading a .458 SOCOM or .450 Bushmaster rifle, the Faxon Superfinished BCG provides enhanced durability, smoother cycling, and dependable performance in demanding applications.

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