US Marines from 1st Reconnaissance Battalion training to shoot at target on hill with powerful M2 .50cal machine gun, Mk-19 automatic grenade launcher and .<br /><br />U.S. Army paratrooper from Company B, 2nd Battalion, 503rd Infantry Regiment, 173rd Airborne Brigade using M2 machine gun, M320 Grenade launcher, M4 .<br /><br />U.S. Marines assigned to 2d Low Altitude Air Defense Battalion (LAAD) and Headquarters Battery, 10th Marine Regiment participate in a heavy machine gun .
