The Model 642 Performance Center is a factory-enhanced version of the standard 642 with a ported 2.125-inch barrel, smoothed double-action trigger, and Performance Center tuning. The porting vents gas upward to reduce muzzle flip — useful for .38 Special +P loads in the lightweight Airweight frame. The slightly longer 2.125-inch barrel compared to the standard 1.875-inch improves velocity modestly. Type: Revolver Action: Double-Action Caliber: .38 Special +P Capacity: 5 Year introduced: 2003, USA Weight: 15.3 oz Overall length: 6.5" Status: Active Intended use: concealed_carry, self_defense, law_enforcement