The definition of "assault weapon" is completely meaningless. Guns shoot bullets, bullets are deadly, end of story.
Here's an analogy: let's say people were using ricers - cars with stupid spoilers, LED lighting underneath, loud sounding exhausts, etc., to kill people by running people over, banning "assault weapons" is like banning riced cars. Completely meaningless. The legislation has zero effect on the lethal part of firearms. A Honda Civic without the stupid lights, stupid fins, and fart can can still run over people EQUALLY as effectively.
Ohhhh, a scary bayonet mount, ohhhh, a folding stock, ohhhh, a barrel shroud, ohhhhh, a flash suppressor, ohhhhh, it's colored black! It's an assault weapon. But this one, the one with a nice maple wood grain stock, that shoots the exact same bullets at the exact same rate... this one is a semi-auto hunting rifle. Everyone knows that wood grain stocks are like kryptonite to terrorists.