The M4 medium tank equipped with the GAA V8 water-cooled gasoline engine of Fuwu Company is named M4A3. Because it performs better than other types of M4, it has the highest evaluation in the army. Almost all M4A3s are reserved for personal use. The M4A3 tank is the same as other M4 tanks of the same series. The earliest production model has a 56-degree inclination angle on the front hull. However, the M4A3 with this feature is rarely used in actual combat. The M4A3, which is used extensively by the US military in the Eurasian battlefield, is mainly a standard production type with a 47-degree inclination angle of the entire front armored hull. It is matched with a high-back turret. The rear part of this type of turret is slightly elevated in appearance, and the right front side is slightly convex outwards during casting to thicken the armor, so there is no need to weld additional armor from now on.