Smith & Wesson M&P Shield/Shield Plus 9mm Luger Threaded Pistol Barrel 3.7in 1/2x28 Black. 7in Barrel. Specifications for Smith & Wesson M&P Shield/Shield Plus 9mm Luger Threaded Pistol Barrel: Manufacturer: Smith & Wesson Color: Black Barrel Length: 3.7 in Threads per Inch: 1/2x28 Caliber: 9mm Luger Gun Make: Smith & Wesson Gun Model: Smith & Wesson M&P Shield Plus Smith & Wesson M&P Shield Weight: 5 oz Package Contents: Smith & Wesson M&P Shield/Shield Plus 9mm Luger Threaded Pistol Barrel What firearm models does the manufacturer say Smith & Wesson M&P Shield/Shield Plus 9mm Luger Threaded Pistol Barrel is compatible with? The manufacturer suggests that Smith & Wesson M&P Shield/Shield Plus 9mm Luger Threaded Pistol Barrel is compatible with Smith & Wesson M&P Shield Smith & Wesson M&P Shield PlusSmith & Wesson 13882: M&P Shield/Shield Plus 9mm Luger Threaded Pistol Barrel 3.7in 1/2x28 Black