The M3 A1 Scout Car was an American scout car developed between 1929 and 1939. It was a 4X4 weighing 5 tons, powered by a 110 hp engine. Armament was one 50 caliber machine gun facing forward and two 30 cal at the rear.
Lt Col. Robert J. Icks, Tanks and Armoured Vehicles. Phillip Andrews Pub. 1945