Marines brace for a detonation during a grenade and

Marines brace for a detonation during a grenade and MK-19 Grenade Launcher range at Marine Corps Base Camp Lejeune, N.C., Oct. 28, 2015. More than 70 Marines with 2nd Low Altitude Air Defense Battalion took turns handling the MK19 and handheld grenades during the familiarization range. The range offered Marines the opportunity to build confidence and proficiency skills on some of the crew-served weapons they operate while providing security in a deployed environment. (U.S. Marine Corps photo by Cpl. N.W. Huertas/Released)