Blue Label program Gen4 G22 duty pistol. The Gen4 G22 Blue Label represents the final evolution of the dominant .40 S&W duty pistol before agencies began transitioning to 9mm. Many current surplus Gen4 G22 pistols originated from Blue Label LE purchases. Type: Semi-Automatic Pistol Action: Striker-Fired Caliber: .40 S&W Capacity: 15 Year introduced: 2010, Austria Weight: 25.95 oz Overall length: 7.32" Status: Discontinued Intended use: law enforcement, duty