AB1 02 Action Base 1 Gray 1/144 1/100 HG MG R3

The first iteration of the action base, hence the number, the Action Base 1 (AB1) is primarily designed for use with 1/100 scale Gunpla (e.g. Master Grades, Reborn-One Hundred); though it can also accommodate 1/144 and SD Gunpla. The standard design is a single octagon base with a small detachable square.

The AB1 saw a redesign in 2015, distinguished from the regular Action Base with the runner designation BA-13. The circular slots in the base are arranged symmetrically and no screws are needed in the assembly. However, this item has only been a kit inclusion, i.e. not yet released as a separate item.

The AB1 is also recommended for some 1/60 kits as a support for weapons or accessories that would be too heavy for the MS to carry by itself. In a few cases, one is included in the kit's release, like with the PG MBF-P02Kai Gundam Astray Red Frame Kai (regular AB1) to support the Tactical Arms IIL and the PG GN-0000GNHW/7SG 00 Gundam Seven Sword/G (BA13) to support the Buster Rifle/Buster Sword.