No it is quite simple actually.
None.
This. Is OP trolling? If someone shouldn't own a gun, they shouldn't be in society.
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They had cannon though... thank god you are OK with having a home defense cannon and a few mortars in the back of the truck.
Oh, my... you do realize that cannon IS an anti-tank weapon, right? And they had it 223 years ago... way in advance of needing it against tanks.
Right? The battlefields of 200 years ago were pretty terrible with grape canisters shot out of cannon, perfectly legal for civilian ownership everywhere in America.