Okay so here's Vahtou's recent WIP. Note that he isn't quite finished yet so there's still a lot to be done.
The weapons detach and store. The saber sword and shield hookup switches out with the storage container easy. He stands about 12 inches tall [accurately at 11 1/2 inches.]
So since he already has a lot of weapons, then why not try to find a place to store them?
Front view ^
Side/back view ^
Note that Vahtou is taller than this unit, but that's fine. It holds all weapons and can store one more. A gun [another part to be finished before official release.]