American liberals, as a rule, believe that our founders (fresh from a war they won with muzzle-loaded weapons) left us in a terrible mess with respect to modern guns.
A war they won with muzzle-loaded weapons, including cannon, against an adversary that fought back with muzzle-loaded weapons, including cannon ... and a lot more of them. And a lot more money to keep the supplies coming.
In 1776 muzzle-loaded weapons were "modern guns."
If the 1st amendment can now cover the internet and the 4th electronic and digital surveillance, the the second can darned sure cover a semi-auto rifle, no matter what the darned thing looks like!
I read that somewhere...