I just got off the phone with Ruger and they are sending me the collar. This has to be the greatest company in the world to do business with. I got the last one in the service dept. They have to order more. No charge, will ship today.
I am told I should be able to work it out from the top.
If there is any interest I can post back with my results.
Edit: A backup plan, which will not be needed, might to to cut a stainless shim for under the express sight.Not recommended, just my own last resort if the collar was not available.
