[yequalsx]

According to the quote I have of the Wikipedia article there are Supreme Court cases that say it does limit the type of arms.

[ameister14]

Yes, you can't have sawed-off shotguns, for example, because those are not a military weapon and cannot contribute to the common defense.

[lostapathy]

Only because Miller was not properly heard almost 100years ago.

Short barrel shotguns were extremely common in world war 1 trench warfare, and that’s what Miller was charged with. Too bad he was dead before the supreme court heard that case.