The Stuart light tank was officially designated M3. This kit depicts an later version M5 which was sometimes known as the Stuart VI. The main difference between the M3 and M5 was Twin Cadillac engines, a redesigned hull and a new raised engine deck. The M5 had a M3A1 turret and the M5A1 had and M3A3 turret. The M5 was introduced in 1943.