M50 or M-50 may refer to: In transportation: M-50 (Michigan highway), a state highway in Michigan M50 motorway (Great Britain), a motorway in England M50 motorway (Ireland), a motorway in Ireland BMW M50, a 1989 automobile piston engine The FAA identifier of Boardman Airport in Boardman, Oregon In science: Messier 50 (M50), an open star cluster in the constellation Monoceros In military vehicles and aircraft: M50 Super Sherman, an Israeli tank M50 Reising submachine gun, an American su… (More on M50)