I sent my .30 Remington AR in for repair to DPMS on a dust cover that would not stay shut and something causing a sharp pointy burr on the head stamp of the spent cases. They decided to "Polish and ream chamber" as noted on their invoice. **Note the feed ramp** it did not look like this before I sent it in, it looks like a drunk sailor did the job with a dremel. Not to mention, the dust cover still will not stay shut and after firing the rifle today, I noticed there is still a sharp pointy burr on the head stamp of all spent cases.
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