KY Jon. Thank you for replying. I did see the difference in screws on the floor plate and was curious. It was also my concern about the 3-inch chambers that they had been lengthened. I had done some reading on the creation of the super fox and the 3-inch chambers and with that serial number the timing was off. I was unaware there was a Fox gun prior to the A.H. Foxs. Thank you for the information.