Fail Zero Assembled Bolt Carrier Group AR-15 5.56/.223/300 Blackout, Black - FZ-AR15-01-NH-BLACK

Fully assembled bolt carrier group (BCG) designed for mil-spec AR-15 upper receivers and compatible with 5.56, .223, and 300 Blackout cartridges. Features EXO Nickel Boron coating on all critical parts, providing permanent dry lubricity, extreme durability, and enhanced wear and corrosion resistance. Ready to drop in with no additional lubrication required.