I bought a used 56 caliber Thompson Center smoothbore. The trigger guard is steel, not black like most Renegades. The screws that hold the trigger guard on are brass, not steel. The ramrod thimbles are browned steel. The barrel is browned. The screws that hold the sideplates for the barrel wedge are also brass. It is not a kit. There is no K on the barrel or in the stock. Is this an old Renegade, or did someone switch everything?