page_title: Stevens Model 520/620
section_title: Model 520-30 and 620A (US military)
hierarchical_section_title: Stevens Model 520/620 / Model 520-30 and 620A (US military)
caption_attribution_description: English: Stevens Riot Gun Markings (620A)
context_page_description: The Stevens Model 520 was a pump-action shotgun developed by John Browning and originally manufactured by the J Stevens Arms & Tool Company between 1909 and 1916. Stevens was sold to New England Westinghouse on 28 May 1915 and production of civilian firearms was greatly reduced. The company was renamed the "J Stevens Arms Company" on 1 July 1916 and New England Westinghouse used their manufacturing facility in Chicopee Falls, MA to produce Mosin-Nagant rifles under contract for the Russian Czar during World War I. After the war, Stevens was sold to Savage Arms on 1 April 1920 and full production of civilian firearms resumed. Under Savage ownership, Model 520 production continued until 1939 when it was replaced by the Model 520A which ended production in 1948. Stevens also further modified the design when they introduced the streamlined Model 620 in 1927. The Model 620 was internally similar to the Model 520 and was produced until 1939 when it was replaced by the Model 620A which ended production in 1955. This shotgun is a hammerless, pump action, take-down design with a tubular magazine which holds 5 shells.
context_section_description: During World War II, Stevens began producing both the Model 520A (renamed the Model 520-30) and the Model 620A (labeled as the Model 620) as trench guns, riot guns, and long-barreled training guns for the US military.  Trench guns were produced with 20-inch barrels (cylinder bore) and had heat shields with unique pinkish anodized bayonet lugs attached to the front (late war examples had a small "S" stamped on the left side).  
  The receivers of both models were stamped on the left side (from front to back) with a small "P" and ordnance bomb, "Model 520-30" or "Model 620", and a small "U.S." over the trigger. Model 520-30 trench gun barrels are marked "Proof Tested--12 Gauge --2 3/4 Inch Chamber--" on the left side and have another small "P" and ordnance bomb and the "J Stevens Arms Company" address on the right side of the barrel.  This was done so that all the markings could be read with the heat shield installed.  Some Model 620 trench gun barrels were marked in the same manner as the Model 520-30 trench guns and some had all the barrel markings on the left side.  Trench guns were also fitted with a sling swivel in the stock.  Riot guns also had 20-inch barrels (cylinder bore) and had all the same martial markings, except that all the barrel markings were on the left side.  The long barreled training guns were marked in the same manner as riot guns and were mainly used for aerial gunnery training.  Total wartime production of all Model 520-30 shotguns was 33,306 and all Model 620 shotguns were 12,174.  
  After the war the US military standardized both the Model 520-30 and the Model 620 and kept them in the inventory.  They were used in the Korean War and as late as the Vietnam War.
caption: Stevens World War II riot gun markings (M620A)
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