J. Stevens 520 12 Gauge shotgun in a trench gun configuration. 20" barrel, choked cylinder. Ordnance bomb and U.S. stamped on receiver above trigger. "1941" is also stamped on the left side of the receiver. Has small "P" and Ordnance bomb stamp on left side of barrel just in front of receiver. Armory cartouches on left side of stock. Barrel has heat shield and bayonet lug with the Eagle head proof mark on the front end.