When has a civilian ever stopped a mass shooting with an AR-15? An AR-15 is a perfect weapon for mass murderers -- not so much for self-defense. Would you bring an AR-15 along on a date? To your place of work? To the movies? If not, how can own an AR-15 save your life in the event of a mass shooting? Why does the NRA keep telling us we need semi-automatic rifles for self-defense? Whose side are they really on?