Phase 5 Weapon Systems BCGM16 Bolt Carrier Group Black Phosphate Stainless Steel AR-15/M4/M16

The Phase 5 Weapon Systems BCGM16 Bolt Carrier Group is a mil-spec complete BCG purpose-built for the AR-15, M4, and M16 family of rifles. Built around a heat-treated and chrome-lined carrier, it is finished with a corrosion-resistant black phosphate coating for smooth, reliable function and long service life under hard use.

Constructed from stainless steel with an overall length of 7.5 inches, this bolt carrier group comes fully assembled and ready to drop into your build. The included bolt is high pressure tested (HPT) and magnetic particle inspected (MPI) for quality assurance, while the gas key is properly staked to mil-spec standards. As a direct-fit mil-spec component, the BCGM16 serves equally well as a duty-grade replacement or as the foundation for a fresh build.

Complete bolt carrier group includes:

• Heat-treated, chrome-lined bolt carrier with black phosphate finish
• HPT/MPI-tested bolt assembly
• Cam pin
• Firing pin
• Staked gas key
• Retaining pins and springs

Drop-in ready for any mil-spec AR-15, M4, or M16 upper receiver, the Phase 5 BCGM16 delivers the durability and reliability expected from a true mil-spec bolt carrier group at a price that makes it ideal for both duty use and range builds.