U.S. Marines with 2nd Battalion, 8th Marine Regiment, currentlyâ¯forward deployed with 4th Marine Regiment, 3rd Marine Division as part of the Unit Deployment Program,â¯conduct a M107 .50-caliber rifle range at Rodriguez Live-Fire Training Complex, Pocheon, South Korea, April 17, 2026. The M107 sniper rifle is a semi-automatic, .50-caliber rifle used by the United States Marine Corps for long-range precision and anti-materiel missions, capable of engaging targets at extended distances and disabling equipment with high-impact firepower. (U.S. Marine Corps video by Lance Cpl. Oscar Ocampo)