I just bought a XD 9mm SC and have not fired it yet. I noticed right above the mag release, on both sides, what looks like a hairline crack in the frame. Concerned, I returned to where I purchased it and got the on site gunsmith to look at it. He said it was just mold markings and not to worry. Im curious if anyone else has these crack like markings. They are about an eighth of an inch long, and right behind the little pin above the mag release.