100-round mag available mail order), this gun was sufficient to account for all the carnage without the shooter needing the shotgun and two Glocks he also brought.
I've browsed gun-nut websites trying to discover why someone would legitimately want a weapon capable of killing an entire platoon of soldiers. They are not hunting rifles - the AR-15 is illegal in most states for hunting game. There was one guy who posted a comment that he keeps his AR-15 by his back door "to shoot varmints," although it was unclear from context whether the varmints were human or animal. Most people consider it a "home defense" weapon for those all to frequent times when the entire population of the Hells Angels Motorcycle Club invade your home and you need to create a "killing zone" out of your second floor stairwell.
The AR-15 is extremely popular with the military, ex-military, and wanna-be military.
Remington 12-gauge shotgun
song and story, the Glock is really popular with gun nuts as the girl gun. The standard clip is 10 rounds but these larger magazines hold over 30 bullets. The Aurora killer was carrying two Glocks.
The Aurora Gun Club