FailZero

FailZero AR10, Bolt Carrier Group, Black, No Hammer FZ-AR10-NH-BLACK

FailZero AR9, 9MM BCG, Black Nitride FZ-9MM-NITRIDE-BCG

FZ .450 Bushmaster BCG

FZ .224 Valkyrie

FailZero Lightweight/Low Mass Bolt Carrier Group, No Hammer, EXO Nickel Boron Coated, Nickel Finish, 9.2 oz Total BCG Weight FZ-LW-BCG-01-NH

FailZero 458 SOCOM Bolt Carrier Group, No Hammer, Nickel Boron Coated FZ-458-01-NH