A closure element applying medical device for repairing a fistula is described. The closure element applying medical device can be configured for repairing any type of fistula that provides an abnormal channel from one body part to another body part (e.g., organ to organ, organ to vessel, and/or vessel to vessel). Examples of fistulas that can be repaired with the present invention include anorectal fistulas, enteroenteral fistulas, enterocutaneous fistulas, vesicovaginal fistulas, arteriovenous fistulas, perilymph fistulas, rectovaginal fistulas, ureterocolon fistulas, and the like. The medical device can include a closure element, a shaft, a carrier assembly, and controller systems. The medical device can also include a locator assembly. Additionally, the closure element applying medical device can include endoscope components so as to function also as an endoscope.