I picked up a used FNP9 on Friday from Gander Mountian on Friday. Got around today to tearing it down and noticed the firing pin safety is stuck in the up position, the gun was in great shape, built in 2007, looks like it was fired very little, but wasn't cleaned before it was fired the first time due to the heavy grease residue on the slide rails and in the extractor hole like most of my guns when they came from the factory. I have the rear of the slide soaking in a jar of kroil right now, just enough to cover the safety so hopefully it will be released in the morning. Just wondering if anyone else has had this problem before. Thanks in advance.