Three versions of the AR-15 assault rifle, similar to one of the guns used by Omar Mateen to kill 49 people in an Orlando night club.
Three versions of the AR-15 assault rifle, similar to one of the guns used by Omar Mateen to kill 49 people in an Orlando night club. Rich Pedroncelli AP
Three versions of the AR-15 assault rifle, similar to one of the guns used by Omar Mateen to kill 49 people in an Orlando night club. Rich Pedroncelli AP