What is this supposed to be?

[JayTownsend]

Both the M8 & M20 should be classified as Armored Cars:

The M20 was a derivative of the M8 Greyhound series. The chief difference between the two armored cars was the absence of a turret which allowed the M20 to feature benches and specialized radio equipment for use as an artillery spotter, reconnaissance vehicle, or personnel carrier.