Model 642 Airweight with Crimson Trace Lasergrips factory-installed. The laser is integrated into the grip panels and activates automatically when the gun is gripped normally. The most popular factory laser-equipped revolver in S&W's production history. Type: Revolver Action: Double-Action Only Caliber: 38 Special +P Capacity: 5 Year introduced: 2007, USA Weight: 15 oz Overall length: 6.31" Status: Active Intended use: Concealed Carry / Backup