Tokyo Arsenal Model 1927

The Experimental Submachine Gun (試製自動短銃, Shisei jidō-tanjū) was a submachine gun of Japanese origin, manufactured by Tokyo Arsenal.^[1] The Imperial Japanese Army developed the Model 1927, which was fed from a drum magazine. It was ordered from Tokyo Arsenal and tested by the army. However, it was inferior to submachine guns such as the MP 18, and broke during the test. In 1930, a second trial was conducted, and the gun was again by rejected by the army. Model 1 was made in 1936 and Model 2 was made in 1937. Model 2 was at first 6.5 mm caliber, but was later revised to 8 mm.

Tokyo Arsenal Model 1927
Type	Submachine gun
Place of origin	Empire of Japan
Production history
Designed	1927
Manufacturer	Tokyo Arsenal
Specifications
Mass	3.2 kg
Length	690 mm
Barrel length	230 mm
Cartridge	8x22mm Nambu
Caliber	8 mm
Action	Blowback
Rate of fire	300–600 rpm
Muzzle velocity	340 m/s
Sights	Iron