I don’t think anyone could pull off a coup in the US so long as there are 300 million guns in private hands. Literally millions of armed Americans would step forward to stop it.
Around about Thanksgiving time every year, the largest armed force on the planet takes to fields and forests across this country with a unified intent. They plan to kill deer. This armed force, (or infantry) combined, is the largest actively armed force on the planet. There is no doubt, at least the founders idea of civil resources to defend against enemies foreign and domestic is still in full effect.
When I go deer hunting, whether bow or gun, I always also pack a side arm. I imagine many others do to. This is only relevant to point out, Deer hunters ARE in fact armed like soldiers.