Taran Tactical Innovations Firepower For Smith&Wesson Full Size Pistol Magazine Extension 5/6 Round Black. Specifications for Taran Tactical Innovations Firepower For Smith&Wesson Full Size Pistol Magazine Extension 5/6 Round: Manufacturer: Taran Tactical Innovations Color: Black Finish: Hard Coat Anodized Magazine Capacity: 5 - 6 Round Gun Make: Smith & Wesson Gun Model: Smith & Wesson M&P 40 Smith & Wesson M&P 9 Features of Taran Tactical Innovations Firepower For M&P 9/40 Full Size Magazines 5/6 Round Pistol Magazine Extension:10percent stronger spring included.Overall weight 1.2oz.Length 1 1/2 inch front side 1 inch on back side.Patented proven push-pin design.Easily attaches and detaches from the magazine.No specialty tools or devices required to disassemble.One piece design no extra parts to possibly lose during disassembly.Fits the USPSA 140mm gauge.Not legal for Production Division.Holds 20+1 rounds of .40 S&W.Holds 23+1 rounds of 9mm.The added weight helps the magazine drop free easier for faster reloads. Package Contents: Features of Taran Tactical Innovations Firepower For M&P 9/40 Full Size Magazines 5/6 Round Pistol Magazine Extension What firearm models does the manufacturer say Taran Tactical Innovations Firepower For Smith&Wesson Full Size Pistol Magazine Extension 5/6 Round is compatible with? The manufacturer says that Taran Tactical Innovations Firepower For Smith&Wesson Full Size Pistol Magazine Extension 5/6 Round is compatible with Smith & Wesson M&P 9 Smith & Wesson M&P 40Taran Tactical Innovations MPB940-01: Firepower For Smith&Wesson Full Size Pistol Magazine Extension 5/6 Round Black