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CODE – 04-125-973

NAME – Yak-B

NAME (NATIVE) – Yakushev-Borzon 12.7 GRAU Index 9-A-624

COUNTRY OF ORIGIN – USSR

DATE OF MANUFACTURE – 1973

CALIBER – 12.7x108mm

OVERALL LENGTH – 134.5 cm (53 in)

BARREL LENGTH – 100 cm (39.4 in)

RIFLING (TYPE & TWIST) – Right-hand twist, 1 turn in 38.1 cm (15 in)

LOAD – B-32 Spitzer-pointed boat-tailed full jacketed with hardened steel core and incendiary filling

BULLET DIAMETER – 13.0 mm (0.512 in)

BULLET WEIGHT – 45.7 g (705 grains)

MUZZLE VELOCITY – 840 m/s (2755 fps)

MUZZLE ENERGY – 16,112 j (11,884 ft/lb)

WEIGHT (EMPTY) – 45 kg (99 lb)

TYPE OF MOUNT – VSPU-24 Chin turret

SIGHTS – KPS-53AV sight slaved to turret

EFFECTIVE RANGE – 2,000 m (2187 yards)

OPERATION – Gas

TYPE OF FIRE – Full automatic

CYCLIC ROF – 4,000 to 5,000 rpm

FEED DEVICE – Linkless ammunition feed

FEED DEVICE WEIGHT (LOADED) – 195.66 kg (431 lb 6 oz) 1,470 rounds 12.7x108mm B-32 API

BASIC AMMUNITION LOAD – 1,470 rounds

LOAD WEIGHT – 195.66 kg (431 lb 6 oz)

MANUFACTURER – KBP Design Bureau

STATUS – Production completed

SERVICE – Soviet Union and Allies

     Primary forward machine gun armament of the Mi-24V Hind attack helicopter

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