The 'Combat Car' name was superfluous, and the cavalry unit tanks redesignated: M1 Combat Car as the Light Tank M1A1 and M2 Combat Car as Light Tank M1A2.
Выпущено 24 единицы* Combat Car M2 (позднее Light Tank M1A1) — версия с двигателем W-670, но изменённой трансмиссией и подвеской.