Gryazev-Shipunov GSh-301

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GSh-301 cropped.jpg
Type Automatic cannon
Place of origin Soviet Union
Service history
In service 1980–present
Production history
Designer V. Gryazev, A. Shipunov
Designed 1977
Produced 1980–present
Weight 46 kg
Length 1,978 mm
Barrel length 1,500 mm
Width 156 mm
Height 185 mm

Cartridge 30×165mm
Caliber 30mm
Barrels 1
Action Short recoil operated
Rate of fire 1,500–1,800 rounds/min
Muzzle velocity 900 m/s

The Gryazev-Shipunov GSh-30-1 (the actual Russian designation is GSh-301; also known by the GRAU index designation 9A-4071K) is a 30 mm autocannon designed for use on Soviet and later Russian military aircraft, entering service in the early 1980s. Its current manufacturer is the Russian company Izhmash JSC.


The GSh-301 is a single-barreled, recoil operated autocannon weighing 46 kg (101 lb). Unlike many postwar cannons, it uses a short recoil action instead of a revolver cannon or Gatling gun mechanism. This results in a reduced rate of fire, but lower weight and bulk.

The GSh-301 has a rate of fire of 1,800 rounds per minute, customarily limited to 1,500 rounds per minute to reduce barrel wear. Despite that, its barrel life is quite short: 2,000 rounds. When firing a continuous burst of 100–150 rounds, the barrel is put under so much stress that it has to be replaced.[1] The gun uses an evaporation cooling system to prevent the detonation of a high explosive round inside a heated barrel. This cooling system consists of a cylindrical water tank around the rear end of the barrel. The GSh-301 is equipped with a unique pyrotechnic mechanism to clear misfires: a small pyrotechnic cartridge is located to the left of the 30mm cartridge chamber. This pyrotechnic cartridge fires a small steel bolt through the side wall of the 30mm cartridge. The hot propellant gases following the bolt into the dud 30mm round ignite the powder charge of that round and firing continues.

The gun's maximum effective range against aerial targets is 200 to 800 m and against surface or ground targets is 1,200 to 1,800 m.

In combination with a laser rangefinding/targeting system, it is reported to be extremely accurate as well as powerful, capable of destroying a target with as few as three to five rounds. It has been deployed on several different types of fighter aircraft:


The 30x165 mm rounds, fitted with distance-armed and delayed action fuze, are commonly fired from the GSh-301. This type of ammunition is intended to engage air and ground targets. The 30x165 mm round can have several projectiles. Its variants are:[1] [2]

  • Armour Piercing Tracer (AP-T)
  • Armour Piercing Incendiary Tracer (API-T)
  • Semi Armor Piercing High Explosive (HEAP)
  • Inert Armour Piercing (AP Inert)
  • High Explosive Tracer (HE-T)
  • Short Range High Explosive Tracer (HE-T-SR)
  • Inert High Explosive Tracer (HE-T Inert)
  • High Explosive Incendiary (HEI)
  • High Explosive Incendiary Tracer (HEI-T)
  • Target Practice (RTP)
  • Target Practice Tracer (RTP-T)


See also[edit]