Nock gun
Nock gun is a volley gun or artillery model.
Overview
Type of volley gun.
In detail
Nock gun is a volley gun or artillery model.
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
“Nock gun”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q1995193: Nock gun
Consult the source