AP Source: Assault Rifle Jammed in Colo. Attack 0 researchok US News7/22/12 6:24:11 amSunday, July 22, 2012 at 6:24 am PDT • Views: 1,020 boston.com More Colorado Attack Assault Rifle Disabled Weapon 100-Round Drum Magazine High-Capacity Ammunition Magazin Mass Shooting Semiautomatic Assault Rifle