The P-51 Mustang is considered by many to be the best fighter aircraft of WWII. The P-51 Mustang came about when the British Purchasing Commission asked North American Aviation to produce the Curtiss P-40 for the RAF, but North American stated they could build something better. The P-51D is considered by many experts to be the definitive variant of the Mustang as it was the most widely produced. It featured a bubble canopy which gave the pilot superb all-round visibility as well as a heavier armament of six 12.7mm machine guns. The unmistakable form of this famous aircraft is accurately reproduced based on actual design drawings of the aircraft as well as thorough study of actual examples of the aircraft.