In this Dec. 27, 2012 file photo, a variety of military-style semi-automatic rifles obtained during a buyback program are displayed at Los Angeles police headquarters.
In this Dec. 27, 2012 file photo, a variety of military-style semi-automatic rifles obtained during a buyback program are displayed at Los Angeles police headquarters. Damian Dovarganes Associated Press file
In this Dec. 27, 2012 file photo, a variety of military-style semi-automatic rifles obtained during a buyback program are displayed at Los Angeles police headquarters. Damian Dovarganes Associated Press file