(U.S. War Department Technical Manual TM 9-750, 1942.) black-and-white diagrams illustrations M3 Medium Tank Armament May 12, 2014by Lone_Sentry_Admin1 min read Diagram showing the armament of the M3 Medium Tank. (U.S. War Department Technical Manual TM 9-750, 1942.) (U.S. War Department Technical Manual TM 9-750, 1942.)