I think that one of the reasons the constitution was written, was so that the Government could be overthrown. I don't have the exact quote but Jefferson intimated that it would be required, every few hundred years or so. That's why they gave us the right to free speech, and the right to bear arms.

Full disclosure - I own no firearms and am not a member of the NRA. I do however, believe in the vision of our founders...

Sorry about the thread drift.