Gryazev-Shipunov GSh-23
Gryazev-Shipunov GSh-23 is an autocannon or artillery model.
Also recorded as GSh-23; GP-9; UPK-23; SPPU-22.
Overview
23 mm twin-barreled autocannon aircraft armament.
In detail
It is associated with Soviet Union. The record gives 1959 as its date of establishment or first appearance.
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-23”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1007100: Gryazev-Shipunov GSh-23
Consult the source