AT-AT Walkers are surely tough guys as seen in the movies, especially in Battle of Hoth.
In S01E01 (Droids in Distress) of Star Wars: Rebels TV series,
a small group of stupid jerks (plus, R2-D2 and C3P0) successfully destroyed two AT-AT Walkers within few minutes.
Were those Walkers original ones appeared in the movie or small versions or early prototype?
Initially, I thought they were small versions. But, then I noticed that the weapons used on Walkers were some kind of illegal weapons (T7 Ion Disruptors) capable of disabling Star Destroyers. So, it's possible that those Walkers were original ones.
Can you deduce whether they were original ones or not?