The main armament was one 37mm Type 94 L36.7 tank gun. It elevated between -15 to +20 degrees and had an azimut range of 20 degrees left and right. Muzzle velocity was 600 m/s (early model) or 700 m/s (late model), penetration: 45 mm/300 m (early model) 25 mm/500 m (late model). The commander was responsible for loading, aiming, and firing the main gun. The Type 95 tank carried two types of ammunition, Type 94 high-explosive and Type 94 armor-piercing. The Type 95 Ha-Go light tank was the most numerous Japanese tank produced during the Second World War. By the standards of 1935 it was an acceptable light tank, and it performed well in China in the late 1930s and in the period of Japanese conquests in 1941 and early 1942, but once it came up against more modern Allied tanks its thin armour and by then weak gun left it very vulnerable. The Type 95 light tank was officially named the Ha-Go (third model), but was often known in the army as the Ke-Go (light vehicle).