The Gryazev-Shipunov GSh-30 (ГШ-30) is a family of autocannons used on certain Russian military aircraft.
The GSh-30-1 (also known as "GSh-301") is the standard cannon armament of most modern Russian fighters including the Yak-141 Freestyle, MiG-29 Fulcrum, Su-27 Flanker and its' various derivatives. The GSh-30-2 is carried by the Sukhoi Su-25 Frogfoot ground attack plane and in external gun pods. The GSh-30-2K is a modified version with 2400mm long water-cooled barrels and variable rate of fire. It is used on a fixed mounting on Mi-24P Hind-F helicopters.