I would like to see a towed anti-tank gun. An M3 could tow the gun, to shoot the gun would require a timer to first deploy, then load and fire, say 1 minute. While deployed, the gun is static, and cannot move, unless it is rehitched to the M3, again taking 1 minute.
Reason to perk: give it an enhanced sighting system able to zoom in further than other vehicles, enabling it to hit and kill effectively.
Its air defense capabilities are only the MG in the M3.
Armor should be the same as the M3 making it an easy kill if hit.
Ute.