Marine Unmanned Aerial Vehicle Squadron 4 (VMU-4) is an unmanned aerial vehicle (UAV) squadron in the United States Marine Corps that operates the RQ-7B Shadow. It is the fourth UAV squadron in the Marine Corps and the first in the reserve component. The squadron, nicknamed the “Evil Eyes”, entered the force structure on July 1, 2010, when Marine Observation Squadron 4 (VMO-4) was reactivated and redesignated VMU-4.