I am not by any means an expert on FN Hi-Powers, but as I was sitting in my living room fondling my gun I noticed that the barrel appears to have a small crack all the was around the barrel just forward of the locking lug (see picture). The crack is tiny and I wasn't even sure if it was a crack or a mark on the barrel, however, I tried polishing it with my dremel and it appears to be a crack. Is this normal or is my worst fear realized that the barrel should be replaced? I own many pistols and have never seen this kind of crack on a barrel. The crack is so straight it appeared at first as if it was two pieces. It is so small I can't get a picture.