A fellow who posts regularly on Accurate Reloading said he will make hex-head action screws, polished and blued, for the CZ 550. If you are interested go to accuratereloading.com and then go to the forums. Scroll down to "Gunsmithing" and click on it. Next, go to the thread on "allen head action screws for cz" and click on it. Fellow named Jefferso will turn the screw heads so they fit in the CZ ports, polish and blue them. He will leave it up to the individual to rile the screw to length. Tom Purdom