Advanced Armament 22 suppressor Rated for 22LR, .17HMR, and .22Magnum hosts Threaded 1/2x28 Constructed of stainless steel and titanium Low first round pop 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. EL00854