CODE – 04-062-939
NAME – Type 99
COUNTRY OF ORIGIN – Japan
DATE OF MANUFACTURE – 1939
CALIBER – 7.7x58mm (7.7 Arisaka)
OVERALL LENGTH – 118.1 cm (46.5 in)
BARREL LENGTH – 55.2 cm (21.75 in)
RIFLING (TYPE & TWIST) – 4 Grooves, Left-hand twist,
LOAD – – Spitzer-shaped full jacketed ball
BULLET DIAMETER – 7.87 mm (0.310 in)
BULLET WEIGHT – 11.92 g (184 grains)
MUZZLE VELOCITY – 719 m/s (2360 fps)
MUZZLE ENERGY – 3086 j (2276 ft/lb)
WEIGHT (EMPTY) – 10 kg (22 lb 1 oz))
WEIGHT (LOADED) – 11.27 kg (24 lb 14 oz) loaded with 30 rounds 7.7mm ball
TYPE OF MOUNT – Folding bipod with monopod on stock
WEIGHT OF SPARE BARREL – 2.72 kg (6 lb)
SIGHTS – Open, iron, adjustable, Front sight – Inverted V, Rear sight – Drum-adjusted aperture, graduated from 200 to 1,500 meters in 100 meter increments (219 to 1640 yards in 109 yards increments), Later war production, rear sight simplified to flip-type L with apertures and no drum adjustments for range.
OPTICAL SIGHT WEIGHT – 0.37 kg (13 oz)
OPTICAL SIGHT MAGNIFICATION – 2.5 Power
OPTICAL SIGHT FIELD OF VIEW – 13 degrees – 22.75 m @ 100 m (68.2 ft @100 yds)
EFFECTIVE RANGE – 800 m
OPERATION – Gas, fires on open bolt
TYPE OF FIRE – Full automatic
RATE OF FIRE – 200 rpm
CYCLIC ROF – 800 rpm
FEED DEVICE – 30 round removable box magazine, double column, double feed
FEED DEVICE WEIGHT (EMPTY) – 0.46 kg (1 lb)
FEED DEVICE WEIGHT (LOADED) – 1.27 kg (2 lb 13 oz) loaded with 30 rounds 7.7 ball
BASIC AMMUNITION LOAD – Twelve 30-round magazines (360 rounds)
LOAD WEIGHT – 15.24 kg (33 lb 10 oz)
MANUFACTURER – Nambu Arms Manufacturing Co., Nagoya Arsenal, Kokura Arsenal, Hatachi Seisakushho Co., Tokyo
STATUS – Obsolete
SERVICE – Imperial Japanese military forces, Army and Navy
In 1943, the buttstock monopod was dropped from production of the Type 99 to simplify manufacture. In Japanese fashion, the Type 99 machine gun could accept a bayonet. It would mount the standard Infantry Type 30 bayonet with a 39.9 cm (15.71 inch) blade and a weight of 1.47 kg (3 lb 4 oz).
