The Brownells M16 .458 SOCOM/450 Bushmaster Bolt Carrier Group provides users with a complete assembly, also including a firing pin, cam pin and a firing pin retaining pin. The bolt head is built using 9310 steel, which undergoes heat treatment and shot peening for a durable finish, while the carrier itself is made using 8620 steel that undergoes hardening after machining. The extractor construction includes a rubber insert and spring, and the gas key is torqued and staked.
The black-nitride finish offers increased corrosion resistance and the assembly undergoes magnetic particle inspection to ensure reliability in your big-bore AR-15 platform. Made in the U.S.A., guaranteed forever. Whether you’re running .458 SOCOM or .450 Bushmaster ammunition, this purpose-built bolt carrier group delivers the durability and performance heavy-hitting cartridges demand.
