An 11th Security Forces Group Airman opens a box of 7.62mm ammunition for a M240B Medium Machine Gun for heavy weapons qualification Mar. 4, 2013, at Marine Corps Base Quantico firing range, Quantico, Va. Airmen from the 11th SFG qualified on the M240B, Squad Automatic Weapon, and the M203 grenade launcher. (U.S. Air Force photo by Staff Sgt. Perry Aston)