Product Description
The Phase 5 M16/M4 Bolt Carrier Group is a mil-spec, heat-treated BCG (Bolt Carrier Group). The Carrier's interior is chrome-lined and the rest is coated with black phosphate for long-lasting durability. The complete BCG includes everything needed to drop into an AR-15 in 5.56 NATO, .223 Remington, and 300 AAC Blackout caliber rifles. Mil-spec Heat-treated Chrome-lined carrier interior Reliable Black phosphate finish Drop-in ready Designed for use with 5.56 NATO, .223 Remington, and 300 AAC Blackout