Wasn’t there a ruling once that said shotguns were not used in wars, so they weren’t protected?
A decenting view...
Shotguns were used in WW1- trench guns if I am not mistaken
It was United States v. Miller, and the actual issue was that short-barreled shotguns were not used as weapons of war.
They were, in fact, used by the tens of thousands in WWI by the United States Army. However, since neither Miller nor his attorney showed up to present this evidence as an argument to the court in his defense, it was ruled that since short-barreled shotguns were not used by the military, they were not protected under the Second Amendment.