Pro-series Bersa Thunder in .40 S&W with a 4-inch barrel. The Pro designation indicates enhanced features including improved sights and a more refined trigger over the base Thunder. Type: Pistol Action: Semi-Automatic Caliber: .40 S&W Capacity: 13 Year introduced: 1996, Argentina Weight: 30.7 oz Overall length: 7.5" Status: Active Intended use: Service/Duty