It was only in the 1970s that the National Rifle Association basically invented the new constitutional theory that the Second Amendment conferred a personal right to own military grade weapons for “self-defense.”
Bulls%#t. It was well known from the 1700s on that it meant personal ownership, not just militias.
Not only that, but the USSC Miller decision of 1934, as wrong as it was in the application of law, made clear that Milita/military arms for the people was the intent of the 2nd Amendment. The court was not provided evidence that a sawed off shotgun was actually used by the military in WWI.