Sergeant Thomas Reed, the training noncommissioned officer of Truck Company Alpha, Headquarters Battalion, 1st Marine Division, disassembles a Mk-19 grenade launcher during the Basic Mk-19 Heavy Machine Gun Course here, June 11, 2013. Throughout the course, non-infantry Marines were instructed by experienced machine gunners who are veterans of combat. The course tested Marines on the weapon nomenclature, weapon conditions, the weapon's range, different types of ammunition and range cards. The Marines were ultimately evaluated on a live-fire range.