This is a fine example of a World War II U.S. contract Stevens Model 520-30 trench shotgun with the bayonet lug adapter and ventilated six-hole handguard. A martial variant of a John Browning designed sporting gun, the 520 trench gun was originally developed in response to a World War I request for new fighting shotguns for the American Expeditionary Force. It made a strong impression on the evaluators but did not make it into the field before the armistice was signed. Seeing potential for the gun on the police market, Stevens kept production going until 1932, and at the outbreak of World War II, the U.S. government bought every 520 that was still in the warehouse. Checked back into the arsenals at the end of the war, many were sent back into the field for the Korean War and Vietnam. The right of the barrel has the three-line Stevens company address, and the left has the two-line gauge markings. Choke gauges at cylinder. The left of the receiver is stamped "MOD.520-30" ahead of "U.S.", and the correct "P" above a flaming bomb proof is on the right of the barrel at the breech and left front edge of the receiver. The stock and bayonet lug are correctly fitted with sling swivels. Filled in hole were a previous sight bead once resided on top at the muzzle ahead of the adapter. Length of pull is 14 inches. Includes a "1917" dated Remington M1917 bayonet with green leather scabbard, and a green canvas web sling.

Very fine, retains 85% arsenal refurbished dull blue military type finish on the barreled action and magazine tube with some cycling wear and minor surface freckling, and 97% original blue finish on the handguard/bayonet adapter. Wood is very fine with some light scratches, a hairline crack visible on the left of the forearm, and defined edges. Mechanically excellent. Bayonet is fine, scabbard is good.