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. 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, it can also be carried in external gun pods and mounted on the pakistani-chinese JF-17 Thunder. 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. Variants GSh-30-2 GSh-30-2K Specifications (GSh-30-2) Manufacturer: KBP Instrument Design Bureau Type: dual-barrel autocannon Caliber: 30×165 mm, electrically primed Operation: recoil operation Length: 2,044 mm Barrel Length: 1,500 mm Weight (complete): 105 kg Rate of fire: 1,000–3,000 rpm Muzzle velocity: 870 m/s Projectile weight: 390 g Mounting platforms: Sukhoi Su-25 "Frogfoot" Specifications (GSh-30-2K) Manufacturer: KBP Instrument Design Bureau Type: dual-barrel autocannon Caliber: 30×165 mm Operation: recoil operation Length: 2,944 mm Barrel Length: 2,400 mm Weight (complete): 126 kg Rate of fire: 300 rpm (low) – 2,000–2,600 rpm (high) Muzzle velocity: 940 m/s Projectile weight: 390 g Mounting platforms: Mil Mi-24P "Hind", Sukhoi Su-25 “Frogfoot” See also List of Russian weaponry List of multiple-barrel firearms Users References Sources External links The Russian Ammunition Page Modern Fighter Gun Effectiveness Artillery of Russia 30 mm artillery Aircraft guns of the Soviet Union Autocannons of the Soviet Union KBP Instrument Design Bureau products Military equipment introduced in the 1980s