A closed-bolt blowback-operated submachine gun, the Reising Model 50 saw action with the U.S. Marines in the Pacific as a substitute for the M1 Thompson, though they found their best success as defensive weapons for war-essential industries and as patrol carbines for American police forces. Blade front and elevation adjustable peep rear sights, with a flash hider/muzzle break, cooling fins on the barrel, three-line New Haven address near the ejector port, and three-position selector/safety on the right side. Smooth pistol grip stock with a cocking lever on the underside, a canvas sling, and a lightly ribbed buttplate. A gold-colored sticker (probably late 20th century in origin) is applied to the buttplate, reading "PROPERTY OF/00338/WASHINGTON COUNTY COMMISSIONERS"; the specific Washington County was not identified by the consignor, but such stickers can be seen on vintage weaponry that was still in police/sheriff department inventory in the 1980s and 1990s. One extra magazine is included.