If you are looking for new tactical rear stock set up for your Mini, this is for you! This black aluminum stock is only 7-1/5" long and lightweight. Includes an extension tube, sling swivel, foam over tube, and a 1/2" recoil pad. The sling swivel can be relocated to any of four different locations. (photos shows it on lower rear) The stock has been machined a bit to fit with our rear stock adapter designed only for the MPA .45 acp series. This set up will not fit any other MPA guns. Includes rear stock adapter, bolt, and ACE rear stock ONLY. (gun & other parts sold separately)Addition of this item may require additional paperwork to be filed with the ATF, check with your local dealers. Allen wrench included.**TELL US IN THE COMMENTS SECTION OF YOUR ORDER IF YOU HAVE AN OPEN BOLT MAC-10, WE NEED TO GIVE YOU A DIFFERENT BOLT AND INNER THREADED BLOCK.