The AT-AR was a variant design of the All Terrain Scout Transport. It had heavier armor than the AT-ST and was more suitable for frontline combat than lighter bipedal walkers. It was also smaller and faster than the scout walker. The AT-AR's "head" was situated closer to its legs, giving it a more hunchbacked look. The stock version was armed with a single, large laser cannon.
The view out the cockpit was more extensive than on the AT-ST, with a big, angular viewport in place. The cockpit had seating for one driver and one commander, situated side-by-side. Horizontal loopholes were located on the sides of the vehicle's turret, similar to the loopholes on the All Terrain Defense Pod.
The AT-AR could be modified to carry more armaments. One walker model was fitted with additional side-guns on the turret during service on Cilpar. Another variant of the AT-AR walker was built with relatively thin armor and went by the name light AT-ST.