I thought I'd split this into it's own thread since it may get lost elsewhere...
here's the original thread

here's the upper I bought

I'm having problems seating Colt mags in my Anvil Arms lower with mag block. I think I found the culprit, which appears to be the ridge inside the upper conflicting with the mags. I'm not sure if I should grind off the ridge or attempt to adjust the mag block in some way? This lower never had any issues with the RRA or Colt uppers that I used with it previously.

*No* I have not called PSA yet, although I did send them an email. I just figured this out over the weekend and haven't had time to call yet. I'm hoping it's just an easy fix on my part.

the inside of the upper where you can see the wear (this is without any firing, simply inserting and removing the mag a few times)
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this is the inside of the mag block. Un-pinned, no visibble set screw, possibly held in simply by mag catch?
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