T85 M-GMC

In 1943, development work began on both the T18 and T19 gun mounts. Each of these two mounts would feature four 20mm guns for antiaircraft use; the T18 would be fitted with guns manufactured by Oerlikon, while the T19 would use guns from Hispano-Suiza. The projects for the vehicles that would equip these mounts were cancelled later that year. However, both the T18 and T19 were given new life in 1944, when they were fitted to the same chassis used for the T65 gun motor carriage. The vehicle with the Oerlikon gun mount was designated the T85.