gun into the coaxial position and the larger M2 to the turret roof. Another version was considered for the French Army, adopting a tank gun able to fire the supersonic (Anti-Char Rapide Autopropulsé) anti-tank guided missile, as well as high explosive rounds. A prototype was finished in 1967 with a new cast turret, wide enough to hold the much larger armament. However, the high costs of the missiles forced the French Army to abandon the program in 1972. The vehicles based on the chassis include an armoured recovery vehicle, a bridgelayer, a self-propelled anti-aircraft vehicle, a tactical nuclear missile launcher and a self-propelled artillery piece. AMX-30D – Dépanneur-Niveleur The armoured recovery vehicle, known as the AMX-30D (AMX-30 Dépanneur-Niveleur), was designed to recuperate or help maintain vehicles in the field. Work on the AMX-30D began in 1966, as the French Army researched developing a recovery vehicle to be issued to units receiving the AMX-30 tank. A prototype was produced and delivered for experimentation in 1971, and in February 1973 the first of a pre-series of five vehicles was delivered. That same year, another 100 AMX-30Ds were ordered, and these began production in 1975. The recovery vehicle includes a winch powered by the vehicle's engine, with the ability to pull a maximum of of weight. The vehicle also has a heavy towing cable, while an auxiliary winch has another towing cable, able to tow up to when working over the front of the AMX-30D. In the latter case the vehicle must be supported by removable props, which are carried on the vehicle, and the bulldozer blade must be lowered on the ground. The crane can lift up the power pack and the turret. Instead of a turret, the AMX-30D is fitted with a superstructure, and weighs , although with the extra power pack it can weigh up to . The vehicle can protect itself with a machine gun. The driver's visibility is aided by the inclusion of three M-223 episcopes. The AMX-30D has a maximum on-road velocity of and a maximum road range of . AMX-30H – Poseur de pont The AMX-30H bridgelayer, or Poseur de pont, consists of the AMX-30's chassis with a box-like superstructure, supporting a scissor-type folding bridge. The bridge can span gaps. The bridge has a width of , but can be increased to through the use of appliqué panels. It can support weighs of up to .