U.S. Marines with Marine Corps Europe (MARFOREUR) practice long-range shooting with the M110 Semi-Automatic Sniper System (M110 SASS) during NATO .br br br Marines check and fire their M110 Semi-Automatic Sniper System (M110 SASS) rifles to maintain proficiency. AiirSource covers events and missions from the .br Another gert US Military video The M110 Semi Automatic Sniper System (M110 SASS) is an American semi-automatic sniper rifledesignated marksman rifle that .