I assume GP was talking about serious crew served weapons like artillery, MANPADS, and the like. You are correct that the US is already set in terms of small arms, with its civilian population owning more guns than all the militaries of the world combined[0].

That being said I think GP's prediction of a civil war triggered by inflation is hysteria.

[0]https://www.smallarmssurvey.org/sites/default/files/resource...