This is the problem - people seem to always assume that it would be current US military with the current state of the country behind it versus a militia - with a reasonably large country wide uprising there would be defections from the military, some who'd refuse to take a side, the military would be unable to defend all its installations and bases, etc. and have to concentrate at least initially into positions of strength. There is no guarantee it would go like the last civil war and even Syria is an example that things like tanks, aircraft, ballistic missiles, etc. are of limited use against a mobile, organised, soft target that is fighting on its own home turf - it has taken what almost 7 years to just wear down ISIS who've rarely numbered above the lower tens of thousands in what is largely open terrain.
The realities, as to what is most likely to defeat an attempt to fight back by a militia are more in actual numbers and organisation than the disparity in equipment, etc. most of the militias and the likes in the US struggle to keep any kind of active membership going in any kind of numbers.