While cleaning my Zpap92 pistol, I noticed the circular metallic line inside the gas block. I was using my flashlight to inspect. I'm afraid there is a burr somewhere in there.I keep that area oiled as I have a minor rust problem and unforutunately live in a very humid climate ( south western Washington State) I was able to capture a part of it with my phone camera.
Is this something I should be concerned about?