https://en.wikipedia.org/wiki/Gun_laws_in_the_United_States_by_state
Rifles are long guns.
i think the specific word here is
assault rifles. its pretty clear that anything assault wise made easily purchased would only enable more shootings to happen, not lessen it. handguns and home defense weapons like shotguns/rifles, sure, but there's not really any reason to allow access to full assault rifles to the public.
the caliber of such rifles also tends to penetrate any armor police/swat members have as well, unless its downscaled for civilians.
correct me if im wrong anywhere. i dont have a complete grip on gun laws/definitions/regulations but i've watched and read a bunch of stuff that relates to guns at times so i'm speaking from that memory.