I dislike this “only guns from 1700’s” argument. The constitution didn’t make a distinction between shotguns, muskets, pistols, or even cannons. We know that the intent of the 2nd amendment was to make sure if the government got out of line we could put in a new one. That isn’t possible anymore, but would be even more impossible if we restrict “new” guns. TBH, I think the writers of the constituion would be fine with private citizens owning cannons. Some quick Googling indicates private ownership was a thing: aier.org/…/private-cannon-ownership-in-early-amer… but I’ll have to research more.