Japan's only mass-produced submachine gun of WWII. Chambered in the underpowered 8mm Nambu pistol cartridge. Used a curved magazine and had a bayonet lug — reflecting Japanese infantry doctrine. Late-war versions were crude. Type: Machine Gun Action: Full-Auto Caliber: 7.7x58mm Japanese Capacity: 30 Year introduced: 1939, Japan Weight: 96 oz Overall length: 35" Status: Discontinued Military use: Yes Intended use: military