A Marine fires an M240 G medium machine gun at targets while his assistant gunner holds him steady and observes impacts here Nov. 12. The Marine is from 3rd Battalion, 12th Marine Regiment, 3rd Marine Division, III Marine Expeditionary Force. It is the assistant gunner’s job to direct the gunner’s fire as well as reload the weapon. Artillery Marines conduct small-arms training to maintain the ability to defend gun positions from enemy threats. (U.S. Marine Corps photo by Lance Cpl. Erik S. Brooks Jr./Released) - A Marine fires an M240 G medium machine gun at targets while his assistant gunner holds him steady and observes impacts here Nov. 12. The Marine is from 3rd Battalion, 12th Marine Regiment, 3rd Marine Division, III Marine Expeditionary Force. It is the assistant gunner’s job to direct the gunner’s fire as well as reload the weapon. Artillery Marines conduct small-arms training to maintain the ability to defend gun positions from enemy threats. (U.S. Marine Corps photo by Lance Cpl. Erik S. Brooks Jr./Released)