FailZero AR10 Bolt Carrier Group BCG Nickel Boron Coated FZ-AR10-01-NH. 308 Bolt Carrier Group BCG. All essential parts of these Bolt Carrier Groups by FailZero are coated with EXO nickel boron that provides a permanent dry lubricity while increasing...
FailZero AR10 Bolt Carrier Group BCG Nickel Boron Coated FZ-AR10-01-NH. 308 Bolt Carrier Group BCG. All essential parts of these Bolt Carrier Groups by FailZero are coated with EXO nickel boron that provides a permanent dry lubricity while increasing...