Unless enough citizens were on the side of the coup. I don't know why no one ever seems to acknowledge that as a possibility, especially after Jan. 6. Gun owners are just as driven by politics and ideology as anyone else.
Plus just because you have a gun in a safe and maybe sometimes shoot watermelons in the backyard with it doesn't mean you'll be effective in guerilla warfare against an actual military. I know Americans like to bring up Afghanistan and Vietnam as examples of guerilla warfare succeeding against the US, but fighters in both cases still went through training that would break the average American gun owner.