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.

Fine, with 60% of the refinished blue finish, showing areas of brown patina, bright edge wear and mild handling and cycling marks. The selector switch shows strong case colors, and the bolt has some nicks and tool marks. The stock is fair, with cracking at the wrist and butt, rust on the buttplate, and mild handling marks overall. Mechanically very good. NOTE: This weapon is a National Firearms Act (NFA), fully transferable Class 3, which is registered with the Bureau of Alcohol, Tobacco, Firearms and Explosives, (BATFE) that is classified as a "Curios or Relic" as defined in 27 CFR, 478.11. These weapons are still subject to the provisions of 18 U.S.C. Chapter 44 and 27 CFR part 478.