After all the ribbing for buying the KKM conversion barrel on this thread, I feel better after reading about all the accuracy problems with the factory 9mm barrel, especially the older ones. The KKM barrel locks up real tight, is excellent quality and has a better twist rate for the lighter bullets. By the way, KKM isn't listing M&P barrels on their website right now. The brushed stainless barrel looks great in the all black pistol. No regrets.