Phase 5 Weapon Systems M16 Bolt Carrier Group – AR-15/M16 Pattern Rifles

The Phase 5 Weapon Systems M16 Bolt Carrier Group is a full-auto profile BCG designed for AR-15 and M16 pattern rifles. This full-mass carrier provides increased reliability in both semi-automatic and full-automatic applications, with the extra carrier mass helping drive cycling in suppressed or adverse conditions. Whether you're building a new upper or replacing a worn BCG, this component delivers consistent function.

Machined from 8620 steel with a manganese phosphate finish, this BCG is built to mil-spec dimensions for drop-in compatibility with standard AR-15/M16 upper receivers. The bolt is made from carpenter 158 steel, properly staked, and MPI (Magnetic Particle Inspected) for reliability. The black phosphate coating provides corrosion resistance and aids in lubrication retention. Installation is straightforward—simply insert into the upper receiver and install the charging handle.

• Part Type: Bolt Carrier Group
• Compatible Firearms: AR-15, M16, and M4 pattern rifles
• Carrier Material: 8620 steel
• Bolt Material: Carpenter 158 steel, MPI tested
• Finish: Manganese phosphate (black)
• Profile: Full-auto (M16)
• Installation: Drop-in
• Includes: Bolt carrier, bolt assembly, cam pin, firing pin, firing pin retaining pin