How a Ithica 37 Shotgun Works

Wikipedia: The Ithaca 37, also known as the Ithaca Model 37, is a pump-action shotgun made in large numbers for the civilian, law enforcement and military markets. Based on a 1915 patent by firearms designer John Browning for a shotgun initially marketed as the Remington Model 17, it utilizes a novel combination ejection/loading port on the bottom of the gun which leaves the sides closed to the elements. Type Shotgun Place of origin United States Service history Used by See Users Wars World War II Korean War Vietnam War 1989 attack on La Tablada barracks 1992 Los Angeles riots Production history Designer John Browning, Harry Howland Designed 1933 Manufacturer Ithaca Gun Company Industrias Marcati Produced 1937–present Variants Bataan Modelo 71 Ithaca Model 87 Specifications Mass Varies Length 29.9 to 39.6 inches (760 to 1,010 mm) Barrel length 13 to 30 inches (330 to 760 mm) Cartridge 12, 16, 20, or 28 gauge Action Manually operated, pump-action Feed system 4, 5, or 7-round tubular magazine (riot, standard, and extended tube versions)