wall gun
wall gun is a long gun or weapon type.
Overview
High-caliber, smoothbore firearm of the 16th to 18th centuries.
In detail
wall gun is a long gun or weapon type.
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
“Wall gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q578886: wall gun
Consult the source