Smith & Wesson Response Fixed Stock Paddle Grip 9mm Luger 16.5in Black Semi Automatic Modern Sporting Rifle - 10+1 Rounds - The Smith & Wesson Response breaks barriers for those looking to enter the pistol caliber carbine market. With its innovative FLEXMAG System, you can use a wide range of double-stack 9MM pistol magazines from Smith & Wesson and other manufacturers. The familiar MSR controls make it an easy transition for those looking to use on the range, and with the ability to change parts with existing MSR accessories, it makes optimizing to your needs easy. Take control with the new Smith & Wesson Response! 16.5" 1: 10" twist barrel FLEXMAG magazine well adapters. (Interchangeable magazine well adapters that let you use a variety of magazines from Smith & Wesson and other manufacturers.) Fixed Stock Non-threaded Muzzle Flat-face trigger with a crisp break. M-LOK slots on handguard with Picatinny-style rail on top. (2) FLEXMAG magazine well adapters (1-M&P Double stack - installed, 1-G17/G19