Not sure if anyone else has ran into this issue, but I have a model 10 fcp-k sitting in a XLR chassis. I just got a Sig 223 titanium QD suppressor for it and an AR. The barrel is threaded 5/8-24 instead of the standard 1/2-28 for .22 cal. There are no adapters I can find that will allow me to use the suppressor on that barrel. Has anyone ever had one rethreaded or have any other ideas?!