My eariler model P-32 came with a plastic guide rod. My new PF9 also came with a plastic guide rod, but my P3AT has a metal Guide rod. Is there a reason for that or are some P3AT delivered with plastic guide rods. My P3AT is showing some wear after about 75 rounds. The wear is to the frame. Not a big issue, I don't shoot the P3AT that much. Just interested.