MSF-111 was an MSF mouse droid that was manufactured on Uffel, a moon that was inhabited entirely by droids. In c. 31 BBY, the renegade droid LN-73 attempted to shut down the Uffel droid factories, but was prevented from doing so by the Heroes of Cularin, a group of freelance agents. MSF-111 decided that he wanted the agents to take him with them when they left Uffel, and the other Uffel droids gave him permission.