Could just be the wood or dirt. Probably rust though. Separate the action from the stock and get some 0000 Still wool and oil the area where the rust is and rub it with moderate pressure, not too much though, or you'll remove finish. As long as it's not pitted you should be fine.
But if it is VERY light, just use a clean rag or patch with Hoppe's 9.
Last edited by Mosin-Marauder; September 24, 2014 at 08:16 PM.
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