Looks anodized?
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Looks anodized?
My research shows that you have a dime.......thanks for putting the round thing there for reference.
come on, someone had to!!!
Don't own a sig 1911-22, but looking at this picture, I'd say your black ring is the silver ring on the recoil rod.
http://truthaboutguns-zippykid.netdn...911-.22-18.jpg
picture from http://www.thetruthaboutguns.com/201...r-gsg-1911-22/
https://www.youtube.com/watch?v=pKIIBk2YT7M#t=91
https://www.youtube.com/watch?v=QftWJSniFNk#t=125
With these dissemble videos along with the pictures above it sure looks like it fits on your guide rod.