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)