http://www.shipunov.com/rus/str/cannons/gshg.htm KBP Tula manufacturer's website (the website also contains other modern Russian weapons)
Gas-powered four-barrel rotary aircraft machine gun.
Caliber - 7,62 × 54R
Weapon weight - 18.5kg (19kg)
rate of fire - 5000 rounds per minute (5500, 6000)
initial speed - 850 m/s
Other designations: ГШГ-7,62, TKB-621 (ТКБ-621), 9A622
Development began in 1968 at the same time as the development of the JaKB-12.7 machine gun (9A624). He was accepted into service in the late 1970s
It consists of the Mi-24 armament in the GUV-8700 9A669 container (1 × 9A624 + 2 × 9A622), the Ka-29TB helicopter (the movable 9A622 is controlled by the second pilot, the machine gun is mounted just below the left windshield under the movable cover)
Gas-powered four-barrel rotary aircraft machine gun.
Caliber - 7,62 × 54R
Weapon weight - 18.5kg (19kg)
rate of fire - 5000 rounds per minute (5500, 6000)
initial speed - 850 m/s
Other designations: ГШГ-7,62, TKB-621 (ТКБ-621), 9A622
Development began in 1968 at the same time as the development of the JaKB-12.7 machine gun (9A624). He was accepted into service in the late 1970s
It consists of the Mi-24 armament in the GUV-8700 9A669 container (1 × 9A624 + 2 × 9A622), the Ka-29TB helicopter (the movable 9A622 is controlled by the second pilot, the machine gun is mounted just below the left windshield under the movable cover)