CMC Triggers 81631 Bolt Carrier Group Enhanced 223 Rem,5.56x45mm NATO,300 Blackout Black Nitride 8620 Steel AR-15

Overview

The CMC Triggers Enhanced Bolt Carrier Group is precision-engineered for AR-15 platforms chambered in .223 Remington, 5.56x45mm NATO, and .300 Blackout. The carrier assembly is machined from case-hardened 8620 steel and features a flared rear design that reduces carrier tilt and cant while minimizing friction. The bolt assembly is crafted from 9310 case-hardened steel, is shot-peened, and features a Black Nitride finish for enhanced corrosion resistance and lubricity. This BCG is MPI and HPT tested and includes an 8740 steel firing pin, a hardened 4340 cam pin, and a Mil-Spec extractor spring and O-ring. The design is optimized for use with suppressed or short-barreled rifles, featuring enlarged forward ports to ensure proper gas pressure and consistent cycling.

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