I am trying to remember my days working the gun counter in a trap oriented gun shop. My recollection is that the 1100 only cam with a full fixed barrel. You have to keep in mind that during that time, it was the fad to shoot tight chokes at everything. Browning, Beretta, early Perazzi guns all had infamously tight chokes from the factory. That is when Tom Seitz, Eyester, and all those guys started opening up and "tuning" almost every barrel that was shot.