Changing things up a little, I'll be introducing a new robot type.
An early offensive robot, Tanktuars resemble nothing more than Robo-Turrets mounted on a tracked tank chassis. Unlike their stationary bretheren, they have better armor, sensors, and improved offensive weaponry.
Hit Dice: 75
Armor: Neovulcanium (AC2)
Sensors: Class VI
Mental Programming: Programming
Accessories: loading mechanisms for its weaponry, internal storage unit full of ammunition.
Weaponry: Tanktuars are armed with a Cannon as their primary weapon and two Rail Gun Support Weapons (Wisdom from the Wastelands #3) for secondary use.