The Build Booster and Build Booster Mk-II are now available as a set! By combining the two boosters, you can create a variety of customized play styles!
The "Build Booster" and "Build Booster Mk-II" can transform from a fighter jet to a backpack form.
The backpack form can be attached to a variety of aircraft using the various joints included.
Each part can be removed and used as a weapon.
Parts other than weapons can also be customized into various Gunpla using the included joint parts.
