Marines from Marine Heavy Helicopter Squadron 361, Marine Aviation Logistics Squadron 16, 3rd Marine Aircraft Wing, I Marine Expeditionary Force, ensure the .50-caliber machine gun rounds are properly linked to prevent the weapon from jamming. - Marines from Marine Heavy Helicopter Squadron 361, Marine Aviation Logistics Squadron 16, 3rd Marine Aircraft Wing, I Marine Expeditionary Force, ensure the .50-caliber machine gun rounds are properly linked to prevent the weapon from jamming.