The crew was to have advanced vision and fire-control equipment. The cupola, armed with the secondary 7.5 mm machine gun, was to have a large episcope to which the main turret was to be slaved, allowing the commander to lay the 75 mm gun on the target himself, allowing for the possibility that the commander would double as gunner. The cupola also was to be fitted with an optical telemetric rangefinder. The main gun was to be an L/32 75 mm gun, providing, despite its limited caliber-length compared to anticipated comparable AFV main weapons of other major military powers, a good muzzle velocity through the use of Brandt tungsten armour-piercing subcalibre ammunition.