2 mm caliber
2 mm caliber is a cartridge or ammunition calibre.
Overview
2 mm caliber cartridge.
In detail
2 mm caliber is a cartridge or ammunition calibre.
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
“2 mm caliber”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q778935: 2 mm caliber
Consult the source