Gryazev-Shipunov GSh-30-2

The Gryazev-Shipunov GSh-30-2 (ГШ-30-2) or GSh-2-30 is a Soviet dual-barrel autocannon developed for use on certain ground attack military aircraft and helicopters.

Gryazev-Shipunov GSh-30-2
GSh-30-2 on a Sukhoi Su-25
Type	Dual-barrel aircraft autocannon
Service history
In service	1981-present
Production history
Designer	KBP
Manufacturer	KBP
Specifications
Mass	GSh-30-2: 105 kilograms (231 lb) GSh-30-2k: 126 kilograms (278 lb)
Length	GSh-30-2: 2,044 millimetres (6.706 ft) GSh-30-2k: 2,944 millimetres (9.659 ft)
Barrel length	GSh-30-2: 1,500 millimetres (4.9 ft) GSh-30-2k: 2,400 millimetres (7.9 ft)
Shell	30×165mm
Caliber	30mm
Barrels	2
Action	Recoil operated
Rate of fire	1,000-3,000 rpm
Muzzle velocity	870 m/s (2,850 ft/s)
Maximum firing range	~1,800m

The cannon is not related to the Gryazev-Shipunov GSh-30-1, but is a recoil-operated cannon using the Gast principle, like the Gryazev-Shipunov GSh-23L.

The GSh-30-2 was designed for the Sukhoi Su-25 ground attack plane and can also be carried in external gun pods. It measures 2,044 × 222 × 195 mm, with a barrel length of 1500 mm and a weight of 105 kg. The GSh-30K is a modified version with 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.