Shop › FZ M16/M4 BCG NO HAMMER BLK FZ M16/M4 BCG NO HAMMER BLK $179.99 FailZero M16/M4 Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated, Black Finish FZ-M16/4-01-NH-BLACK Quantity: Add To Cart Added! FailZero M16/M4 Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated, Black Finish FZ-M16/4-01-NH-BLACK