Marine Fighter Training Squadron 401 (VMFT-401) is a United States Marine Corps Reserve fighter squadron flying the F-5N Tiger II. Known as the "Snipers", the squadron is the only adversary squadron in the Marine Corps. They are based at Marine Corps Air Station Yuma and fall under the command of the 4th Marine Aircraft Wing and Marine Aircraft Group 41. VMFT-401 is a non-deployable unit.