AAC-1 Hovertank: Black coolant tanks on sides of tank TX-130S Fighter Tank and TX-130T Fighter Tank: Circle at rear of tanks AAT: Rear Panel Armored Tank Droid: Small wheel at the rear of the tank droid Hailfire Droid: Cylinders beneath the cockpit NR-N99 Persuader-class droid enforcer: Rear tread cylinder AT-RT: Cylinder between legs or pilot