Is there anyone out there who might be able to tell me what the outer barrel diameter is of the walther 1250 dominator or the RWS 850 air magnum. Im asking because i am looking at this compensator made to fit a walther 1250 dominator, RWS 850 air magnum, or the baretta Cx4 storm. I want to use this compensator on my .22 walther falcon hunter and I need to find out whether it'l fit the falcon hunters 15.5mm (.625) outer barrel diameter. I would very much appreciate it if anyone has some good suggestions or answers. I wouldnt mind if anyone might have a compensator suggestion for the walther falcon hunter.