Shop › FZ M16 BOLT CARRIER GROUP FZ M16 BOLT CARRIER GROUP $169.99 FailZero M16/M4 Bolt Carrier Group, No Hammer, Completely Assembled, EXO Nickel Boron Coated, Nickel Finish 009-FZM16/4-01-NH Quantity: Add To Cart Added! FailZero M16/M4 Bolt Carrier Group, No Hammer, Completely Assembled, EXO Nickel Boron Coated, Nickel Finish 009-FZM16/4-01-NH