I agree about the sight.  I thought my sporterized was a true carbine until Dick pointed out that the front sight (although correct) was also not properly located in relation to the muzzle, and the brazing used to secure it is actually visible too (bad job).  My serial number was much too high for a true carbine also.  You have a very nice sporter there though!  I wish my sporter was nearly this nice (purchased that way).