So...maybe it wasn't Cosmoline, it was a very heavy oil at the least. In any event, once it came off, I was still pretty impressed, especially at that price point, with fit and finish. I have purchased guns made in the USA, for a LOT more money, that weren't as well put together. A quick trip to the range yesterday for a few hunnerd rounds yielded good results with zero issues.Mine also seemed to be dripping in oil but I didn't think it was cosmoline. I'm hoping to pick her up today and get to the range a little after.