Two Marines with Headquarters and Service Company, 2nd Maintenance Battalion, 2nd Marine Logistics Group (left) and a Marine with 2nd Battalion, 9th Marine Regiment, 2nd Marine Division (right) inspect a .50-caliber M2 machine gun before firing during a field exercise aboard Camp Lejeune, N.C., May 9, 2013. Three machine gunners with 2nd Battalion, 2nd Marines instructed the servicemembers with HqSvc. Co. on the weapon's proper loading, aiming and firing techniques.