Maybe they did.  But are you then arguing that the common citizen should be able to by grenades, mortars, howitzers, armored vehicles, anti-aircraft guns, land minds, jets, bombs, destroyers, aircraft carriers, nuclear missiles...cuz Uncle Sam has all of those and more.

And by the way, for those folks who think having a gun, even an fully automatic rifle, or even many fully automatic rifles, tell me how many minutes you think you are going to last in open battle if you declare full rebellion against the United States? My estimate? Less than 1.