Steel 2 stage stage fake suppressor is threaded to fit your Mac-10 SMG or MPA Semi Auto-.45 acp. It is constructed of high quality, welded steel in a dark parkerized finish to match your Mac-10 giving it a finished tactical appearance. Fits 7/8x9 threads, 11" in length, smaller stage is 7" and larger stage is 4" long. Please call us if you are not sure of thread sizes.(Gun and other components in photos not included) weighs 1lb 8 oz.