Collectors can (and do) own cannons, fighter jets, and tanks today. Whoever or whatever is typing into his TelePrompter must be an idiot or deliberately spreading disinformation. (Almost certainly the latter.)
The Second Amendment was NEVER “passed” you (Biden) sloppy wet defecant!
The plural of cannon is cannon.
You can buy a replica fully operational Civil Was canon on the internet, last time I checked they were going for about 15 grand.