A recently purchased Stainless .22 CMMG Conversion Unit
has damaged my receiver. After I returned from the range, I had to
forcefully yank the unit out of my AR 15. After removing the unit
I noticed that the unit had cut a 1 1/4 inch slice on the interior left
side of the upper receiver extending rearward from the chamber.
When I e-mailed Tech at CMMG, he told me that this is normal!
Is this normal? Do other members have slices (not rubs) on their
receivers?
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