I just acquired an unfired commercial Russian Makarov last weekend. after shooting almost a full box of .380 through it, I took it apart to clean it and found that something is wearing down the ejector, sear, sear spring and the slide rail. I had taken it apart before I ever shot it and it didn't have any issues. there are no burs or anything on the slide. the only thing I can think of is I or someone else may have dropped the slide with the safety on at some point. I have a hard time believing that much wear could be cause from that though. Anyone else have this issue?