The Gryazev-Shipunov GSh-30-2 or GSh-2-30 is a Soviet dual-barrel autocannon developed for use on certain ground attack military aircraft and helicopters.
The Mil Mi-24 is a large helicopter gunship, attack helicopter and low-capacity troop transport with room for eight passengers. It is produced by Mil Moscow Helicopter Plant and was introduced by the
Gryazev-Shipunov GSh-30-2
…2400 mm long water-cooled barrels, a variable rate of fire, and dimensions of 2,944 × 222 × 195 mm. It is used on a fixed mounting on late model Mil Mi-24 helicopters, e.g. the Mi-24P. GSh-30-2…
A Mi-24V of the Polish Land Forces
Mil Mi-24A on display at Riga Aviation Museum in Latvia