1st Light Armored Reconnaissance Battalion is a fast and mobilized armored terrestrial reconnaissance battalion of the United States Marine Corps. Nicknamed the "Highlanders," their primary weapon system is the LAV-25 Light Armored Vehicle armed with the M242 25mm Bushmaster chain gun. They fall under the command of the 1st Marine Division and the I Marine Expeditionary Force. The unit is based out of the Marine Corps Base Camp Pendleton, California.