This is an excellent example of a very desirable World War II U.S. Army contract Stevens Model 520-30 trench shotgun with the correct bayonet lug adapter and ventilated handguard. The right side of the barrel has the three-line Stevens Company address. The left side has the two-line gauge markings "PROOF TESTED-12 GAUGE/-2 3/4 INCH CHAMBER-". Choke gauges at cylinder. The left side of the receiver is stamped "MOD. 520-30", and it has the correct "P/Ordnance Bomb" proof on the barrel and right front edge of the receiver. It has an all blue finish with smooth forearm and pistol grip stock with a black plastic buttplate. The stock and bayonet lug are correctly fitted with sling swivels. Length of pull is 14 inches. Includes a 1918 dated U.S. M1917 bayonet, olive drab green leather scabbard, and M1907 leather sling, Provenance: The Steven Preston Military Collection