As detailed by ABC News, the perpetrator of the Orlando nightclub massacre used a ".223 AR-style Sig Sauer MCX semiautomatic rifle and a Glock 17 9 mm handgun." In contrast to these semiautomatic guns, assault rifles are fully automatic and can fire multiple bullets with a single pull of the trigger. As in the Aurora, Colorado, movie theater shooting, politicians and the media are falsely claiming that the killer used an "assault rifle" or "weapon of war."