I've had the same rifle for over ten years. I have no idea how many rounds I have put through this thing. It's a carbine gas, CMMG with a Carbine weight buffer. I noticed some severe scuffing on the face of the buffer. Is that normal, or, as I have begun to suspect, is my upper potentially out of spec?
https://www.flickr.com/photos/197724...posted-public/
https://www.flickr.com/photos/197724...posted-public/
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