How about that! At one time I wondered if this could be part of a conversion kit, (like the .22's for 1911's) but I was never able to find anything like that. The guy that I bought it from told me that Smith had made the barrels to improve accuracy on these guns, but I could never find any thing to document that either. Since I never shot it, I couldn't say if it really made any difference or not. Thanks for the reply!

Tim