FailZero AR-15 6.8 SPC Nickel Boron Bolt Carrier Group

This FailZeroA(R) AR-15 6.8 SPC Nickel Boron Bolt Carrier Group (BCG) comes fully assembled and ready to drop into most Mil-Spec upper receivers chambered in 6.8 SPC. All critical parts are coated with EXO Nickel Boron technology that provides permanent dry lubricity, and extreme durability and increases both wear and corrosion resistance. The EXO Nickel Boron makes for easy cleanup and will improve the performance of your rifle. This 6.8 SPC bolt assembly is also compatible with the 6.8 SPC II