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In the worst mass public shooting, a killer in Las Vegas used AR-15s, a type of semi-automatic rifle, to murder 58 people. The second worst attack occurred at an Orlando nightclub in 2016, and the killer used both an AR-15 style rifle as well as a very commonly-owned handgun. In the third worst attack, at Virginia Tech, the killer only used to handguns to claim 32 lives.

From 1998 to today, all mass public shootings where shots were fired, handguns averaged 8.3 murders. Rifle shootings averaged 13.3. All attacks where both handguns and rifles were fired resulted in more deaths – 21.4, on average.

"60 Minutes" tried to argue that the AR-15 is the weapon of choice for mass public shooters because its “ammunition travels three times the speed of sound” and does more damage to the human body. “So, you can see why the AR-15’s high velocity ammo is the fear of every American emergency,” claimed CBS’s Scott Pelley.