Hard to say. You're working with a rather obscure gun. Not many people have worked with them, heck I've never seen one in person.
However the gun was designed by Aldo Perrone (my paintball trivia knowledge knows no bounds
), who also designed the Tigershark and Stingray. Designers tends to use similar size threads for their designs, so either part you linked has the potential to work, though possibly you might have to modify it to fully work properly.
Heck, you might be able to get a simple bolt and spacer from the hardware store to work.
Good luck, lets us know if you get it working. And finished pictures when you're done would be great!