The ban was not against "assault rifles", it was against "assault weapons", which is a made-up term that has little relevance to weapon power. Did you look at the picture I linked? I feel like you must not have, because it's pretty clear from looking at it that the ban couldn't have done much, because weapons allowed under the ban were barely different from what was banned. People were not forced to use "lower quality firearms", and were not forced to use lower power ones either.

> if you think we can't stop the shootings

I don't think that. There are lots of things we could do to make shootings less common, and congress just passed (and Biden signed) a bill which does quite a few things which are very likely to make shootings less common.