FailZero M16/M4 Bolt Carrier, No Hammer, EXO Nickel Boron - FZ-M164-01-NH-MATTE
FailZero M16/M4 Bolt Carrier, No Hammer, EXO Nickel Boron - FZ-M164-01-NH-MATTE, This Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most mil spec M16, M4 or AR-15 upper receivers. All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, extreme durability and increases both wear and corrosion resistance.Features:Nickel boron treatedExtreme durabilityDry lubricityCorrosion resistant