A cousin has a Winchester Model 1300 black slug gun with an extra long magazine. It appears to me that a standard field barrel of 28 inch length would not fit because of the extended magazine ring on the barrel. Also to match the gun the barrel would need to be anodized. In looking at the Winchester site and others it does not appear that a 28 inch barrel is available for the slug gun with the long magazine and anodized. Any one have more information on this?