That looks fairly close, but Im not sure its the same marker.
Notice how the charging handle is exposed on the link you added, where as it is completely different on the pictures I took. The internals actually thread into the body on the marker I have, and the "charging handle" is just a sleeve around a screw which threads into the bolt. The marker you found looks very, very similar to an ariakon ACP.
Perhaps this is a prototype of the later production version? Or [more likely] an earlier production model based on the core ZX as Agent Smith had earlier suggested.