Nudelman-Suranov NS-23
Nudelman-Suranov NS-23 is an aircraft artillery or autocannon.
Also recorded as NS-23.
Overview
23 mm autocannon designed as 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
“Nudelman-Suranov NS-23”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q195412: Nudelman-Suranov NS-23
Consult the source