Staff Sgt. Jeremy Simms briefs a group of Marines on safety procedures during a grenade and MK19 Grenade Launcher range at Marine Corps Base Camp Lejeune, , Oct. 28, 2015. More than 70 Marines with 2nd Low Altitude Air Defense Battalion took turns handling the MK-19 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. Simms is a low altitude aerial defense gunner with the battalion. ( Marine Corps pho

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Staff Sgt. Jeremy Simms briefs a group of Marines on safety procedures during a grenade and MK19 Grenade Launcher range at Marine Corps Base Camp Lejeune, , Oct. 28, 2015. More than 70 Marines with 2nd Low Altitude Air Defense Battalion took turns handling the MK-19 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. Simms is a low altitude aerial defense gunner with the battalion. ( Marine Corps photo by Cpl. Huertas/Released)

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