Pistol-configuration M&P15-22 with an 8-inch barrel, SB Tactical pistol brace, and the same blowback .22 LR action as the rifle version. Compact, lightweight, and inexpensive to shoot, it functions as both a trainer and a fun range toy. Type: Semi-Auto Pistol Action: Gas-Operated Caliber: .22 LR Capacity: 25 Year introduced: 2017, USA Weight: 4.8 oz Overall length: 24" Status: Active Intended use: Training, Range, Plinking