FailZero M16/M4 Bolt Carrier Group EXO Nickel Boron Coated, Nickel - 009-FZM16,4-01-NH
FailZero M16/M4 Bolt Carrier Group EXO Nickel Boron Coated, Nickel - 009-FZM16,4-01-NH, 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