This is a simple political cycle. Guns and ammo fly off the shelves during Democratic administrations, then gun shops go out of business during Republican administrations. This is purely a psychological phenomenon (many aspects of American gun ownership are), since e.g. Trump would be perfectly happy to take everyone's guns if he benefited somehow, while even a hypothetical 70% Democratic Congress would decline to limit gun ownership since the electoral effects would be disastrous.

I don't have any prejudice against guns, but probably less fascination than seen ITT. I have fired a single shot in the last six months, and the result is in my deep freeze.