If Smith & Wesson never marketed the Shield .40 as a convertible gun, they have absolutely no obligation to provide the parts to make it so. It seems to me that a lot of people are mad because they took a gamble buying the .40 because they thought they could get 2 guns for the price of one. For the most part, there isn't anything wrong with that. But, it was a gamble based on something being done to the gun that wasn't supposed to be done. So, if you are going to get pissed off, get pissed off at yourself and not at Smith & Wesson for not providing 9 mm barrels for your .40 conversions. If you were able to do it...good for you. If you can still find a way to do it, again, good for you. However, if you bought the gun just to be able to do it, and now can't, whose fault is that? It also seems that with as many threads about this as there are, that a little research would show that although the conversions work well, the barrels are hard to come by so buying the .40 without 9mm barrels available might not be a good idea if conversion is what you want.

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M&P Shield 9MM