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
