The Americans needed a series of tank destroyers to counter the German Blitzkrieg tactics by driving forward into any gap or break in enemy lines and taking out any enemies that come accross their path. The American tank destroyers had to have less armour and better guns than normal tanks of their age, as well as a turret instead of a partially traversing gun. The T35 prototype had a sloped circular, open-topped turret like that of the M6 heavy tank. This was further developed and taken into production as the M10 Wolverine.
The M10 Wolverine used a M4A2 chassis with an open-topped turret with a 3" gun M7 mounted on it. This had two big counterweights on the back. A .50 Browning M2HB was mounted on the top of the turret and each crewmember had their own weapon for self-defense.