Wilson Combat Match Grade Barrels For S&W M&P - Match Grade Barrel, 9mm, S&W M&P, Threaded 1/2-28 Easily enhance the accuracy of your Smith and Wesson M&P handgun! Wilson Combat Match-Grade Barrels are known for their unsurpassed quality and accuracy. Now your M&P handgun can have this superb accuracy without sending your pistol off to a master... 