"The AR-15 was the gun used by Adam Lanza when he opened fire in Newtown, Conn., last December. Twenty-six people were killed, including 20 first-graders. Everyone was shot more than once — as many as 11 times. And that's what the military wanted out of this gun — the ability to kill even without good aim, a weapon with high-capacity ammunition magazines that could spray bullets within close to medium range."