spaced armour concept the Germans had successfully implemented on the Leopard 1A3 and A4, the AMX-32 fielded greater armour protection to offer increased survivability against anti-tank guided missiles. A autocannon was included as the main gun's coaxial weapon, and a machine gun attached to the roof. However, no orders were ever placed. Production AMX-30 production occurred at the Atelier de Construction de Roanne in the town of Roanne. This heavy manufacturing factory was built during World War I to produce artillery shells, although by 1952 the factory had begun producing armoured fighting vehicles. Before producing the AMX-30, for example, it had made 1,900 AMX-13s and variants. The Roanne factory was responsible for final assembly, most components were made elsewhere: the powerplant by the Atelier de Construction de Limoges, the full armour set by the Ateliers et Forges de la Loire, the turret by the Atelier de Construction de Tarbes, the cannon by the Atelier de Construction de Bourges, the cupola and machine-gun by the Manufacture d'Armes de Saint-Étienne and the optics by the Atelier de Construction de Puteaux; all these again used many subcontractors. In a series of corporate mergers under state guidance, most of these firms would eventually be concentrated into GIAT. Originally, 300 AMX-30s were ordered by the French Army, and by 1971 the order had been increased to 900, divided between eight batches, including all variants based on the chassis. Beginning in 1966, ten AMX-30s were assembled per month, and the first five were issued in August 1966 to the 501st Régiment de Chars de Combat. Monthly production grew to 15–20 tanks as new factories began to manufacture components of the vehicle and existing factories increased their production potential. However, in April 1969, production was again reduced to ten per month. By 1971, about 180 vehicles were in service; in 1975 delivery began of the last 143 units of the final eighth batch of the original order. In 1985, the number of AMX-30s had risen to 1,173. By the end of production, France had accepted 1,355 AMX-30s into service, including 166 brand-new AMX-30B2s. Another 493 tanks were refitted and modernized to AMX-30B2 standards; originally 271 new and 820 refitted vehicles had been planned. The French Army also accepted a large number of variants, including 195 self-propelled howitzers, 44 AMX-30 Pluton tactical nuclear missile launchers, 183 AMX-30Rs, 134 AMX-30Ds and 48 engineer vehicles (AMX-30EBG). The last 35 new