I think they’ve over corrected on the suits thing, wearing those tuxedos all the time is probably overkill.

I think there’s a bit in the first book where Harry says his parents were shot, and Hagrid laughs and says no muggle gun could have killed them.

But like, why not? It’s never explained. I’m sure if they survived being shot, magic medicine would sort them out pretty quickly. But there’s no reassign to think a gun couldn’t kill them. Wizards struggle to react fast enough to block spell s most of the time, and bullets seem to move faster than that.

I think the hardest part would be successfully ambushing Voldy, but no reason to think a gun wouldn’t fuck him up if you can hit him.