Not just the slowest, but the Empire probably couldn't do anything with it on Hoth in the snow. Markus1984 built this alternate, steamy LEGO version of the AT-AT walker for a building competition and while it might be slow, those gatling guns in front look really badass.
Here are some close-ups. Check out the builder's gallery for more.
AT-AT Steampunk by Markus [Flickr, via FBTB]
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