As an armored vehicle, the AT-OT differed from the other walkers in Kuat Drive Yards' AT-series, as it was not designed for combat. Instead, it was used to reinforce armies behind friendly lines as a cargo walker. Even though these eight-legged walkers were well armored and equipped with four laser cannons for defense, their open tops made them extremely vulnerable to attacks from above. AT-OT walkers had enough seats for at least 34 clone troopers, but they could carry more troops if required, thanks to the open-bed design.The vehicle's defenses included two forward cannons and two tail cannons. (Source: Wookiepedia) AT-OT was quite difficult to build for me(I haven't got an AT-TE---lack of parts) but finally I made it.