yes they are the action bases, they work well i got them from Image Anime for $10.00 apeice which is much cheaper then the Yamatos, the YF-19 can have the gunpod, the Vf-0 can to... sort of, but they are a little crooked. the VF-1S with fast pack is to heavy for it however, it comes with many little peices to hook underneath the kits or figures you use on it, i had to cut some of the parts on those pieces to make it work, but they are stable so far and i have had no problems with them.
chris