Readiness

Marines with 3rd Battalion, 25th Marines, 4th Marine Division, conduct a barrel change on their M240B machine gun at Range 410A during Integrated Training Exercise (ITX) 4-21 at Marine Corps Air Ground Combat Center Twentynine Palms, California on July 22, 2021. Range 410A provides Reserve Marines the opportunity to execute a fire and maneuver attack supported by mortarmen, machine gunners and combat engineers. (U.S. Marine Corps photo by Staff Sgt. Jestin Costa)