The Bersa Thunder 40 is a .40 S&W variant of the Thunder 9 platform with an alloy frame and 4-inch barrel. It adapts the proven Thunder action to the .40 caliber for law enforcement markets that adopted the cartridge following the 1986 FBI Miami shootout. Type: Semi-Auto Pistol Action: DA/SA Caliber: .40 S&W Capacity: 13 Year introduced: 2002, Argentina Weight: 31 oz Overall length: 7.35" Status: Active Intended use: Duty, Law Enforcement, Home Defense