sentences:  Unlike nearly all other firearms, there is no "furniture" on the M6 like a butt stock or a forearm the only parts which are not steel are the rubber butt plate and cheek rest.Aircrew were instructed to wrap the barrels with parachute cord as a field expedient fore-stock.The M6 was a superposed ("over-under") combination gun, with a .22 Hornet rifle barrel located above the .410 bore shotgun barrel.