Shop › FZ M16/M4 BCG NO HAMMER BLK NIT FZ M16/M4 BCG NO HAMMER BLK NIT $119.99 FailZero M16/M4 Bolt Carrier Group, No Hammer, Black Nitride Coated, Black Finish FZ-NITRIDE-01-NH Quantity: Add To Cart Added! FailZero M16/M4 Bolt Carrier Group, No Hammer, Black Nitride Coated, Black Finish FZ-NITRIDE-01-NH