anti-aircraft gun
anti-aircraft gun is an artillery gun or weapon type.
Also recorded as aa gun; antiaircraft gun; AAG; Anti aircraft gun.
Overview
Artillery gun primarily used to attack aircraft.
In detail
Its recorded use is anti-aircraft artillery and air defense.
It forms part of anti-aircraft mount.
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
“Anti-aircraft gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q7325635: anti-aircraft gun
Consult the source