My G22 3rd gen has the same serial number for slide and frame, but barrel is different. I bought the gun new in box. From what I have read, all three should have same serial number? Is this correct? I bought the gun with a dealer installed ghost ring sight, I asked about this earlier in the week. Nobody wanted the sight so he sold the gun to me for a really good deal around here. The gun has nearly 1500 rounds through it and it has functioned flawlessly. But should all have the same serial number?