I hate stupid...It is SEMI automatic. That means it fires once for every trigger pull.
And there are plenty other semi automatics that are far more powerful than a .223 caliber.
Everyone is afraid of them because they look mean I guess.
And one more thing. The pistols that nut job used were also SEMI auto's.

In a close quarters battle a shotgun is a devastating weapon, far more powerful than an AR 15 in .223, you can even get them in SEMI auto too.
Also GREAT for hunting rabbits and other cut, furry, and tasty animals.

I get so tired of hearing all these gun tards talking crap that they know NOTHING about.