This is a very fine example of a World War II U.S. contract Stevens Model 520-30 shotgun in riot gun configuration. Originally introduced a bit too late to see action in World War I, the Stevens 520 saw active use for police work between the wars, and available stocks were bought up in quantity when America started arming up for World War II. The left of the barrel has the three-line address along with the two-line gauge markings. Choke gauges at cylinder. The left of the receiver is stamped "MOD. 520-30", and it has the correct "P" and ordnance bomb stampings on the left breech of the barrel and left front edge of the receiver. It has a blue finish with smooth forearm and pistol grip stock with a black plastic buttplate.