Phase 5 Weapon Systems BCG-AR15 5.56 NATO AR-15 Mil-Spec Black Phosphate Bolt Carrier Group

The Phase 5 Weapon Systems BCG-AR15 is a Mil-Spec 5.56 NATO bolt carrier group engineered as a true drop-in upgrade for any standard AR-15 pattern rifle or pistol. The carrier is heat treated and chrome lined internally for long-term wear resistance, then finished in a durable black phosphate coating that matches factory spec.

This complete BCG ships fully assembled and ready to install right out of the box, with the cam pin, firing pin, bolt, and staked gas key already in place. The bolt is HPT (High Pressure Test) and MPI (Magnetic Particle Inspected) per Mil-Spec requirements, giving you confidence every time you send a round downrange.

Built for semi-auto AR-15 platforms chambered in 5.56 NATO / .223 Remington, the Phase 5 BCG-AR15 is an ideal choice for completing a fresh build, refreshing a worn upper, or stashing a reliable spare in your parts kit.