Shop › DEAD AIR KEYMO ZERO .578X28 .45 CAL DEAD AIR KEYMO ZERO .578X28 .45 CAL $90.00 Dead Air Armament Key Mount, Zero, 45 Caliber, .578x28, Nitride Finish, Black DA322 Quantity: Add To Cart Added! Dead Air Armament Key Mount, Zero, 45 Caliber, .578x28, Nitride Finish, Black DA322