The remainder of the armament consisted of the two hull machine guns, one in the front plate, the other in the back plate. They were placed in ball-mounts attached to protruding sections welded to the plates. They too were movable within a cone of 30°. They were of a slightly different modified 7.92 mm Lewis type called the "M. 20 no. 1". The rear machine-gun could be removed and placed in a special mount on the turret roof to function as an anti-aircraft weapon. All three machine guns mounts were extended with a special long armour sleeve to protect the cooling aluminium barrel-casing, typical of the Lewis gun. The specifications asked for a stock of 4,000 rounds of machine gun ammunition; also pistols and twenty hand-grenades should be present.