Actually, the second amendment is a perfect example.
Should I be allowed to own an M-16? How about a SAW, or an M-60 machinegun? An AT-4 rocket launcher? A Bradley? An M1A1 tank? A couple of F-18 hornets loaded with 500 lb. bombs in my backyard?
Why not?
When the Second Amendment was written, the intent was to keep ultimate power in the hands of the people. The citizenry had the same rights to weaponry as the military. They could fight off the Army, if the need arose. Today, that's not the case. Hunting rifles and semiautomatics don't stand a chance against carpet bombings and Apache gunships.
So, should the Second Amendment have been re-interpreted to a different meaning in order to match changing times (as it has been), or should it have kept it's original intent and let us all own TOW launchers?