Thanks Jim, it sure looks like it unscrews, but I wasn't getting anywhere, so I figured I'd make sure I wasn't imaging that was a screw. I was sure I had taken the one off my 1909 6.35 pistol, that's why I was a bit annoyed that I couldn't get this one off.
BTW, I got the info on the Phoenix pistol, thanks. They don't seem to know much about it, I guess it was a company that came and went rather quickly.