Mauser BK 27
Mauser BK 27 is an autocannon or revolver cannon.
Also recorded as Bordkanone 27; BK27; BK 27; BK-27; MN 27 GS; MLG 27.
Overview
27 mm revolver autocannon aircraft armament.
In detail
It is associated with Germany.
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
“Mauser BK-27”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q834801: Mauser BK 27
Consult the source