Shop › DEAD AIR KEY MNT MICRO BRK 1/2X36 DEAD AIR KEY MNT MICRO BRK 1/2X36 $89.00 Dead Air Armament Key Mount, Muzzle Brake, Black, 1/2X36 Threads, .38 Bore DA110 Quantity: Add To Cart Added! Dead Air Armament Key Mount, Muzzle Brake, Black, 1/2X36 Threads, .38 Bore DA110