The person you're responding to asked about assault rifles, and you responded with a link about assault weapons. They're very different things, and this has led to a lot of confusion.

Generally, when people talk about "assault weapons" they're actually thinking of automatic, military-style weapons with large magazines. Those are "assault rifles", which have been legislated at the federal level for a long time. The laws are indeed complicated, but in general these weapons are hard to get legally.

Here's an decent explainer: https://www.ajc.com/news/national/assault-weapon-assault-rif...