Gryazev-Shipunov GSh-301
Gryazev-Shipunov GSh-301 is an autocannon or artillery model.
Also recorded as GSh-301; GSh-30-1; 9A-4071K.
Overview
30 mm autocannon aircraft armament.
In detail
It is associated with Soviet Union.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Gryazev-Shipunov GSh-30-1”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q195437: Gryazev-Shipunov GSh-301
Consult the source