Certain 5.56 rounds will slice right through IIIA body armor that’s rated to stop 9mm, 45, 357.
So what ?? How many people walk around with that type of body armor on...the point being, a .223 round or .556 round at close against unarmed civilians is no more or no less deadly than 12 gauge buckshot or any of the other rounds I’ve mentioned....you can easily die from all of them...
These lunatics are not gun experts but they are committed to killing people, be it with an AR-15 or Glock 19 or 12 gauge shotgun....it really doesn’t matter because a bunch of people will get shot...
Not to mention an m-1 carbine round or a shotgun slug. At it did in my body armor class last century.