Also, let's not kid ourselves -- if it really hits then fan, less than 100% of the US military will side with the tyrannical government. Robert E. Lee was offered command of Abraham Lincoln's army. Lee decided to fight for the other side. This pattern will repeat in some measure.
So, rebels in the US will have a 100 million man army, and some armored divisions, and some serious anti-aircraft capability, and some ...
Robert E Lee did not grow up thinking of the US as his country he grew up loyal to his home state. I think at least 70% of soldiers will side with the one signing their paychecks, at the LEAST
And some aircraft as well.
Load up privately owned P-51s with its 6 or 8 Brownings.