The "Renault ZT 2" was a tank with a larger octagonal welded steel Atelier de Construction de Puteaux (APX) 5 turret equipped with a shortened 25 mm SARF gun, which had a penetration of forty millimetres at five hundred metres. Despite the name, which reflects that it had been designed by the "Atelier de Puteaux" forge, the one-man turret, with a weight of 650 kilogrammes, was fabricated by the "Atelier de Rueil" (ARL), an APX offshoot based at Rueil. It had also been intended to equip the AM 39 armoured car (the Gendron-SOMUA). and the colonial version of the Panhard 178, but apart from the ten ZT 2 vehicles was only fitted to five Panhards, so the planned production of at least 259 remained limited to fifteen.