Mine is in the 1500's and I haven't seen this gouge. I've tried. I can't see it if there is one.
For all those concerned, the thing shoots as good as your eyes will allow you through those iron sights... which is my only complaint while I await the YMA-95 scope to arrive at my door. My range buddy has the FTU on his, which is in the 1400's and it solves the sights / scope issue as well.