The deficiencies of the M3 GMC were quickly noted in the 1941 maneuver, and the experience gained allowed a "perfect" advanced tank destroyer to be planned, one which would give a high priority to speed. However, it would take some time to be developed, and a simpler design was looked for as a stopgap. It was decided to take the proven M4 Sherman chassis and give it a modified 3 inch high-velocity anti-aircraft gun; the resulting combination was designated the M10 Gun Motor Carriage. Compromises were made to the vehicle; the turret was left open and lightly armored, keeping the weight low in order to prioritize the speed of the vehicle. A small number were used in North Africa, and it became a standard vehicle thereafter.