FailZero AR15 Bolt Carrier Group BCG No Hammer Matte FZ-AR15-01-NH-MATTE. The majority of components in these FailZero Bolt Carrier Groups are nickel boron-treated to create a stronger part that is resistant to corrosion and has permanent dry lubricity...
FailZero AR15 Bolt Carrier Group BCG No Hammer Matte FZ-AR15-01-NH-MATTE. The majority of components in these FailZero Bolt Carrier Groups are nickel boron-treated to create a stronger part that is resistant to corrosion and has permanent dry lubricity...