Ahhh, the Action Base. Such a humble, yet indispensible little Gunpla accessory. Whether you want something to prop up your model during a middair pose, or you need something to prop up a broken model, it is always a smart call to have an Action Base or two lying around.
As a fan of 1/144th scale models, my usual go-to is the Action Base 2.
The AB2 is simple and (mostly) reliable, but it has its problems. This is what drove me to look into the other types of Action Bases, to see if they were worth “upgrading” to. If you factor in price, size, features, and availability, there was only one logical choice - the Action Base 5: