Folks on FR may love to use their guns, but folks on FR make up a very small proportion of the population. Do you honestly think the majority of your compatriots will rise up and defy tyranny? Maybe, if it was a direct attack. But it wont be. It will be slow, and drawn out, concession by concession, each small new demand paving the way for the next, and eventually one day they will look around and realise the nation they knew has gone and they didnt even notice it, and they will be castigated for even pointing it out. Think on it. The USA has been on the road to socialist fascism for years - decades in fact. How many people have sprung to arms so far?
As for Americans who own guns standing up for themselves, I'll remind you about 9/11. The first plane crashed into the Towers with (as far as we know), no one storming the cockpit. Then it happened again. By the third time, passengers on flight 93 knew about the other terrorist attacks. They resisted. Since then, Americans and Europeans have taken it upon themselves to restrain crazy Muslims on airplanes. People wake up and learn. And certainly the gun owners of America will be the first ones to come awake.