Name three crew-served weapons used by Marine infantry.

• A. M16A4 rifle, M203 grenade launcher, M9 pistol
• B. M249 SAW, M240G machine gun, M2 .50 caliber heavy machine gun
• C. M249 SAW, M16A4 rifle, M2 .50 caliber heavy machine gun
• D. M240G machine gun, M2 .50 caliber heavy machine gun, M134 minigun

Answer: (B)

In Marine infantry, crew-served weapons are those that require two or more Marines to operate, giving you heavier, sustained firepower beyond a single rifleman. The best trio for standard infantry fire support includes the M249 SAW, the M240G machine gun, and the M2 .50 caliber heavy machine gun. The M249 SAW provides squad-level suppressive fire and is carried and operated by a gunner with an assistant to help with feeding belts and switching shoulders during movement. The M240G offers longer-range, sustained fire with a bipod or tripod, typically manned by a crew who can traverse and fire it as needed to control a sector or defend a position. The M2 .50 cal is a heavy machine gun used for long-range support, anti-vehicle/anti-material tasks, and strong area denial, requiring a crew to operate the weapon and its mount.

The other groupings don’t form three standard infantry crew-served weapons. An individual rifle (M16A4) and an under-barrel grenade launcher (M203) are operated by a single shooter, not by a dedicated crew, and a sidearm (M9 pistol) is a personal backup rather than a crew-served weapon. The other option includes a rotary minigun (M134), which is typically mounted on helicopters or vehicles, not a standard ground infantry crew-served weapon.