T65 M-GMC

Early efforts to develop self-propelled guns using the chassis of the M5 Light Tank were unsuccessful due to the chassis’ small size. However, interest in SPGs as anti-aircraft measures remained, and so in 1941 work began on a vehicle using an M5 chassis that had been extended with a third bogie. The vehicle mounted twin 40mm guns and was given the designation of T65 gun motor carriage. Testing was successful, but the retirement of the M5 from production complicated its approval.