FailZero AR15 Bolt Carrier Group BCG No Hammer EXO FZ009-FZAR15-01-NH. 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 EXO FZ009-FZAR15-01-NH. 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 ....