Davis gun
Davis gun is a recoilless rifle or weapon model.
Overview
1910s recoilless rifle design by Cleland Davis.
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
“Davis gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q3655443: Davis gun
Consult the source