That's a good question. They are also relatively unassembled. The weapons are selectable, removable or adjustable on some at least it seems. That way but you can choose what arms and legs you want if it fits. That would make them even more versatile if you want to change them into a Greyspear over a Swiftfang, etc.
There is some work involved with superglue to be had. Still they are the closest things to the Varks we've seen.