Type 4 rifle

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Type 4 rifle
Type 4 Semi-automatic Rifle
Type	Experimental semi-automatic rifle
Place of origin	Empire of Japan
Service history
Used by	Imperial Japanese Navy
Production history
Designed	1944
Manufacturer	Yokosuka Naval Arsenal
Produced	1945
No. built	Parts for ~200, ~125 complete rifles[1]
Specifications
Mass	4.097 kg (9 lb 1 oz)
Length	1,073 mm (42.2 in)
Barrel length	590 mm (23 in)
Cartridge	7.7×58mm Arisaka
Action	Gas-operated, rotating bolt
Muzzle velocity	840 m/s (2,800 ft/s)
Feed system	10-round internal box magazine loaded via two 5-round stripper clips
Sights	Iron

The Type 4 rifle, often referred to as the Type 5 rifle,^[2] (Japanese: 四式自動小銃 Yon-shiki Jidōshōju) was a Japanese experimental semi-automatic rifle. It was based on the American M1 Garand with an integral 10-round magazine and chambered for the Japanese 7.7×58mm Arisaka cartridge. Where the Garand used an 8-round en-bloc clip, the Type 4's integral magazine was charged with two 5-round stripper clips and the rifle also used Japanese-style tangent sights.

The Type 4 rifle had been developed alongside several other experimental semi-automatic rifles. However, none of the rifles entered into service before the end of World War II, with only 250 being made, and many others were never assembled. There were several problems with jamming and feed systems, which also delayed its testing.