Actually, as I wrote above in the first part of post #68, per the literal interpretation of the 2A, you should be able to walk around with them even if you do intend to do harm to others. If you never actually do that harm... let's say you change your mind... who have you hurt? No one at all.
+1 Exactly. A lot of people fail to realize that private citizens were in possession of military grade material, like canon/warships, at the onset of our nations history. So in theory, there should be no prohibition against anything.
Now comes the tricky part. Would the sounding fathers be okay with private citizens in possession of a weapon they could not possibly conceived of, say a tactical nuclear warhead? I would say probably not.
IMHO, a Constitutional Convention to address this, as well as immigration, states rights, and a number of current issues, is long overdue.