I guess I missed your point. I thought the “few” weapons you referred to were the Glock, the Remington 870(?) and the AR-15 that were supposedly used in Aurora.
Of the weapons used in Aurora, only one was affected by the ban, and a “ban-compliant” version of the AR-15 would have had no features that would changed its lethality.
A ban on magazines above a certain a certain capacity might have reduced the number of rounds the murder was able to fire but only slightly.
In my opinion the gun-ban mindset is so pitiful because it willingly ignores that a ban on murder and assault had no effect. Politicians rail at this or that aspect of the Aurora massacre, but I haven’t seen a single liberal suggest we must now ban boobytrapping apartments in order to kill first responders and create a diversion.
Leftists have their own “assault weapon”— they are happy to use a horrible massacre of innocents to mount yet another assault on the Second Amendment.