SoundPulse
Banned
To quote the wiki: "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."
Going by that, they should work with the older stuff, just have to use the right adapter.
This page has a good breakdown on the different types of bases, and in the pictures you can see the different adapters they come with: http://gundam.wikia.com/wiki/Action_Base
Failing anything else, you can always just drill a hole for the regular adapter.