In this Aug. 15, 2012, file photo, three variations of the AR-15 assault rifle are displayed at the California Department of Justice in Sacramento.
In this Aug. 15, 2012, file photo, three variations of the AR-15 assault rifle are displayed at the California Department of Justice in Sacramento. Rich Pedroncelli AP
In this Aug. 15, 2012, file photo, three variations of the AR-15 assault rifle are displayed at the California Department of Justice in Sacramento. Rich Pedroncelli AP