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Marines assigned to 2nd Low Altitude Air Defense Battalion send rounds down range using various weapons at Marine Corps Base Camp Lejeune, N.C., June 6, 2017. The Marines honed their skills firing the M240B machine gun as well as the M203 and MK19 grenade launchers. Approximately 80 Marines qualified on all three weapon systems during this live-fire training. (U.S. Marine Corps video by Lance Cpl. Cody Lemons/Released)

More than 70 Marines with 2nd Low Altitude Air Defense Battalion participated in a grenade and grenade launcher range at Marine Corps Base Camp Lejeune, N.C., Oct. 28.

More than 70 Marines with 2nd Low Altitude Air Defense Battalion participated in a grenade and Grenade Launcher range at Marine Corps Base Camp Lejeune, N.C., Oct. 28.