The heavy machine-gun vehicle featured the "Modèle réglementaire AVIS-2" turret fitted with a "Hotchkiss 13,2 mm Modèle 1930 mitrailleuse", which could penetrate 20 mm steel at 500 metres. To accommodate the larger machine-gun, the turret was made higher, more so at the left where the commander/gunner was seated and from which side the gun was fed — normally this was done vertically, but to reduce height the gun had been rotated to the left — giving it an asymmetrical and skewed appearance. This heavier type was produced parallel to the 7.5 mm machine-gun vehicles of the first production batch in a number of eighty; it was originally seen as the normal combat version, four of which would be present in a platoon of five. Later however, production was discontinued: though in 1934 even many battle tanks had been so lightly armoured as to be vulnerable to 13.2 mm fire, such a weapon had already become obsolete for this role in 1936. The gun had an ammunition stock of 1220 rounds: 740 in 37 magazines of twenty and another 480 in cardboard boxes.