This is my custom AT-RT design, I tried to get it as close to minifig scale as possible while retaining the possibility and silhouette of the AT-RT. The gun can rotate 180 degrees and the legs are fully posable that can connect to studs, they can even fold up! 

It can be customised to any clone faction you like, in these instructions it includes plain, 501st and Star Corps. The parts list/count and price estiamtite is for all three AT-RTs. The design is inspired by TheTrendingBrick amazing design so definitely check his out for an alternative look.

Playability (5/10): While it has a lot of articulation, some of the pieces are held on by one stud meaning they can fall off quite easily. Animatable (9/10): Due to the extra articulation it can be posed easily, the feet also connect to stud and it can hold any pose. Display (9/10): Can hold a pose and keeps that AT-RT silhouette, it is slightly bigger then minifig scale 

The instructions only include how to make the AT-RTs, none of the minifigs/AT-TE/side builds are included and are only shown for scale references!