This is our new Billet, Galil style stock and rear adapter adapter for the Master Piece Arms .45 acp. It features an open design that is lightweight and offers a great line of sight for using a rail mounted scope. Stock and adapter weigh 1.2lbs. Length with adapter is 8.75" Sling stud included and can be mounted on either side. Replaces the factory push button OEM parts with a slide in adapter and a threaded, machined inside block. Instructions and Allen wrench included. Fits Master Piece Arms .45 acp only. (gun & other parts sold separately)**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.