I live in Arizona, and I am looking to purchase an S-12/S-12c. I am interested in getting into USPSA competition in the Tactical class. This class has a few restrictions on shotguns, the most constraining is that the shotgun must be factory configuration. In addition the barrel length must be no more than 22 inches, and I can start a stage with no more than nine rounds in the gun. Can anyone tell me where I can purchase a Saiga 12 with the pistol grip, adjustable sights, and a 24 inch barrel? ( I plan to cut the barrel and thread it for Briley invector+ chokes) Please keep in mind that the gun