H&R XM-177E2 reproduction muzzle device and grenade ring, brand new in the bag and has never been installed. If installed on a 12.7" barrel then pin & welded, the barrel will be over the 16" minimum for rifle barrel. Also for sale is an H&R CAR-15 reproduction buttstock. These are the cats meow for retro-builds; Vietnam, Blood Diamond, Black Hawk Down, etc... .