Fast And Feeble.

Historical Information:

On November 19th, 1928, an unusual vehicle came out of Fort Meade in Maryland. It looked more like a race car than what it really was: a tank.This was the Christie M.1928, an experimental vehicle built by John Walter Christie's new company, the US Wheel Track Layer Corporation. Christie called his brainchild "M.1940", implying that this was a design ahead of its time. The US Wheel Track Layer Corporation was working on four tanks for the cavalry. These tanks were indexed Combat Car T1.

There was not enough armament for every tank, and one of them (serial number USA W.404) was lacking not only a gun, but a gun mantlet. It was equipped with a 12.7 mm Browning M1918 aircraft machine-gun. A photograph of the tank perpetrated the myth that the Combat Car T1 had different armament than the Convertible Medium Tank T3. In reality, the cavalry tanks had identical armament to their infantry brothers.

Source(s):
https://www.tankarchives.com/2016/11/christie-m1931.html