Pfc. Nathan Murdock, rifleman, 3rd Battalion, 7th Marine Regiment, fires his M27 Infantry Automatic Rifle at a target during the Designated Marksman Course’s culminating event at Range 113, Jan. 28, 2016. (Official Marine Corps photo by Lance Cpl. Levi Schultz/Released) - Pfc. Nathan Murdock, rifleman, 3rd Battalion, 7th Marine Regiment, fires his M27 Infantry Automatic Rifle at a target during the Designated Marksman Course’s culminating event at Range 113, Jan. 28, 2016. (Official Marine Corps photo by Lance Cpl. Levi Schultz/Released)