5.56mm NATO Bolt Carrier Group Nickel Boron
$210.00BPM produced complete Nickel Boron Bolt Carrier Group – Nickel Boron Carpenter 158 Steel alloy bolt per mil-spec – Shot-peened per mil-spec – Nickel Boron coated Full Auto style bolt carrier with Gas Key properly staked per Mil-Spec – Nickel Boron Cam pin, – Mil-spec firing pin and retainer.
