M&P 15-22 pistol variant with a threaded barrel (1/2 x 28 TPI) optimized for suppressor use. The 5.5-inch threaded barrel combined with a quality .22 LR suppressor produces hearing-safe operation. Classified as a pistol; brace optional. Type: Pistol Action: Semi-Automatic Caliber: 22 LR Capacity: 25 Year introduced: 2016, USA Weight: 47.2 oz Overall length: 17" Status: Active Intended use: Recreational Shooting