It would help to have an image, but the high timers on here (I'm not one) may be able to help you. My Sigs have curved marks on the backs of their barrels that some of my friends call "smilies". I'm told that they typically show up on Sigs in just the first few rounds. Since both my pistols are about 20 years old, I never think much about it, but someone told me that the first 15 or 20 rounds might produce them.


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