AMTAC .30 caliber suppressor Overall Length: 9.7 inches Length Added: Only 3.7 inches (6 inches slide over the barrel) Weight: 20.5 ounces Diameter: 1.62 inches Thread Pitch: 5/8x24 This is a NFA class 3 item, there is additional paper work required for this item. The paper work fee is $30 no exceptions. Items require paper work with the ATF to transfer to dealer with an SOT. Time may vary on shipping due to paperwork. Shipping will be applied to any out of state residence. 001126