Action Base 4 is a line of plastic display stands for Gunpla kits and other mecha kits by Bandai. First introduced in 2006, an Action Base allows Gunpla kits to be displayed in aerial poses. Each Action Base comes with an arm that can be adjusted in height and angle, as well as different adapters for older Gunpla kits that do not have peg holes available. The bases are modular and can connect to other Action Bases to display multiple Gunpla kits.