M39 cannon

M39 cannon is a revolver cannon or autocannon.

Also recorded as Pontiac M39.

Overview

Aircraft armament.

In detail

It is associated with United States.

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
“M39 cannon”, English Wikipedia, consulted as further reading
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reference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1880975: M39 cannon
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