“I spent a career carrying typically either an M16 or an M4 Carbine. An M4 Carbine fires a .223 caliber round which is 5.56 mm at about 3000 feet per second. When it hits a human body, the effects are devastating. It’s designed for that,” McChrystal explained. “That’s what our soldiers ought to carry. I personally don’t think there’s any need for that kind of weaponry on the streets and particularly around the schools in America.”
Perhaps he was misquoted.
But at this point, were his teeth on fire, I'd not unzip to put them out.