AUTOMATIC CONCENTRATION U.S. Marines remove the gas valve of an M-249 squad automatic weapon during a class on Camp Lejeune, N.C., Sept. 10, 2010. The Marines are assigned to the 22nd Marine Expeditionary Unit. The class was designed to reeducate the Marines for any future deployments where this weapon may be employed. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 926724-O-PVR09-425.jpg Photo Gallery