@BillRM,
Look Bill--you have called for half the population to rise up against any dictator who sallies forth and you have not the faintest idea what such a struggle would look like. Your OWS movement was dispersed with a few pepper sprays.
If Congress passed disarming you all, with no buy-back, and the President signed it you would either capitulate, as most "law-abiding" citizens would obviously do, or be a criminal with sanctions of a severity to match the threat.
As guns would become rarer and rarer with time your un-disciplined rump of headbangers would be reduced to a last stand on the Sierra Madre.
I can tell you are itching to give it a go. So are some of the others. They have their quota of "make my day" guys as well.