Although the vehicle's appearance was dramatically different, the changes made to it were rather minimal. The superstructure was cut down to be level with the tracks, only completing covering the engine compartment. A new platform was installed with short extensions that can be raised or lowered. However, the vehicle proved to be too top-heavy when firing and was soon abandoned.
The Ram GC would probably be best equated to the German Nashorn. With the platform not deployed, the gun has fairly limited traverse. Given the gun's caliber is slightly larger than the German 8,8 cm, yet was intended to have the same functionality, I would imagine this tank would simply have a bit more raw alpha damage and a little less penetration by comparison. This is also the United States tech tree's only premium tank destroyer option with a six-man crew.
Guns: QF 3.7-Inch Heavy AA Gun
Engines: Continental R-975E-C2 (400 hp)
Suspensions/Alternate Hulls, Total Weight (metric tons): Ram Gun Tractor (29.03)
Hull Armor (mm): 76/76/64
Top Speed: 40 km/h