An 11th Security Support Squadron Combat Arms instructor shoots a Barrett M107 rifle at Marine Corps Base Quantico, Va., July 15, 2016. Joint Base Andrews combat arms instructors shot two weapon systems to familiarize themselves with the weapons to instruct other service members requiring sniper training. (U.S. Air Force photo by Airman 1st Class Philip Bryant)

An 11th Security Support Squadron Combat Arms instructor loads a magazine for a Barrett M107 rifle with .50-caliber rounds at Marine Corps Base Quantico, Va., July 15, 2016. Joint Base Andrews combat arms instructors shot two weapon systems to familiarize themselves with the weapons to instruct other service members requiring sniper training. (U.S. Air Force photo by Airman 1st Class Philip Bryant)

Staff Sgt. Edgardo Rosero, 11th Security Support Squadron Combat Arms instructor, shoots a Barrett M107 rifle at Marine Corps Base Quantico, Va., July 15, 2016. Joint Base Andrews combat arms instructors shot two weapon systems to familiarize themselves with the weapons to instruct other service members requiring sniper training. (U.S. Air Force photo by Airman 1st Class Philip Bryant)

A sniper rifle range target is riddled by rounds from 800 meters during an 11th Security Support Squadron combat arms weapons system training session at Marine Corps Base Quantico, Va., July 15, 2016. Joint Base Andrews combat arms instructors shot two weapon systems to familiarize themselves with the weapons to instruct other service members requiring sniper training. (U.S. Air Force photo by Airman 1st Class Philip Bryant)

Tech. Sgt. Christopher Crean, 11th Security Support Squadron Combat Arms instructor, shoots a Remington M24 Sniper Weapon System at Marine Corps Base Quantico, Va., July 15, 2016. Joint Base Andrews combat arms instructors shot two weapon systems to familiarize themselves with the weapons to instruct other service members requiring sniper training. (U.S. Air Force photo by Airman 1st Class Philip Bryant)