Marine Medium Tiltrotor Squadron 261 (VMM-261) is a United States Marine Corps tiltrotor squadron consisting of MV-22 Osprey transport aircraft. The squadron, known as the "Raging Bulls", is based at Marine Corps Air Station (MCAS) New River, North Carolina and typically falls under the command of Marine Aircraft Group 26 (MAG-26) and the 2nd Marine Aircraft Wing (2nd MAW). They are the fourth squadron in the Marine Corps to transition to the MV-22 Osprey.