The Phase 5 Bolt Carrier Group (brand part no. BCGAR15) is a complete, mil-spec 5.56mm carrier group finished in black phosphate and built to drop directly into a standard AR-15 upper. Phase 5 heat treats and chrome lines the carrier for durability, then verifies the bolt with high-pressure (HPT) and magnetic particle inspection (MPI) testing before it ships. Every unit arrives fully assembled with cam pin, firing pin, bolt, and gas key installed, so it is ready to shoot straight out of the box.

Key Specifications

• Chambered for 5.56mm.
• Built to mil-spec AR-15 dimensions.
• Heat-treated and chrome-lined carrier.
• Ships fully assembled with cam pin, firing pin, bolt, and gas key installed.
• Bolt is HPT/MPI tested for safety and reliability.
• Drop-in, ready to shoot.
• Finished in black phosphate.
• Machined from steel.
• Measures 10.65 inches in length.

Frequently Asked Questions

What caliber is this BCG chambered for? 5.56mm.

Is the bolt tested before shipping? Yes, it is HPT/MPI tested for safety and reliability.

Does this come fully assembled? Yes, with cam pin, firing pin, bolt, and gas key installed, ready to shoot.

Buy the Phase 5 Bolt Carrier Group

Drop a fully tested, ready-to-run BCG into your AR-15. Order it from our AR bolt carrier groups selection at our Lubbock, Texas gun shop for fast, direct shipping.