Aviatsionnaya Krupnokalibernaya - large caliber aircraft gun
designed by B.G. Shpitalnyj and
|(from "Sowjetische Bombenflugzeuge" ("Soviet Bombers"), by W. Kopenhagen)|
|Rate of fire||750-800rpm|
Standard Soviet aircraft cannon since 1936. It was a compact, gas-operated weapon based on the design principles of the ShKAS machine gun. There was also developed a version of 12.7mm caliber, which was abandoned in favour of the Berezin UB series.
The ShVAK was installed both as a fixed and as a flexible weapon. For the latter purpose it was equipped with grip handles. One source states that the variant for flexible installation was designated as MP-20, but this designation can also be found in connection with the whole ShVAK family.