Action Bases are display bases that allow a Gundam model to be displayed in mid-air poses. 6 variations of the Action Base, meant for 1/144 scale, 1/100 scale, and SD kits have been released since 2006, and some models will have an action base included, although it is uncommon. With the exception of weight considerations, there is no strict rule as to what base can be used as long as it fits within the included adapter or x-millimeter peg on the bottom of most models.