quite a bit of money to be spending if you don't know if its going to fit. Other than that I really don't think that it will. All of the rails that I have seen the SureFire X200 fit on to where Universal Rail Mounts. I do know for a fact that you can buy an adaptor if you rail is Proprietary. I have seen pics of what this would look like but other than that the word that I have heard from SureFire is to keep in touch with the web site and see if the come out with somethin for us lonely Walther fans.
Personally I have done a little research on this SureFire X200 and I have liked everything that I have read about it. Utilizing the LED feature as a source of light rather than the regular light bulb. I have read horror stories about people that kept haveing to replace the bulb because the recoil was breaking the filament in the bulb, causeing the light to not work.