Nudelman-Rikhter NR-23
Nudelman-Rikhter NR-23 is a self-loading firearm or autocannon.
Also recorded as NR-23; Norinco Type 23-1.
Overview
23 mm autocannon.
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-Rikhter NR-23”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q902952: Nudelman-Rikhter NR-23
Consult the source