Worked on a bunch of guns over the weekend, and found this part right in the middle of my workspace.
I thought it might go on the recoil spring guide-rod on my Sig 1911-22 since I took it apart and it seemed to fit perfectly, but the exploded diagram doesn't show it.
It seems very nicely machined, so not any type of washer I would think. It had to come off something I worked on, but I am lost.
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