Glock 22 Gen4 law enforcement trade-in. Surplus pistol from agencies transitioning from .40 S&W to 9mm, representing the most recent generation of G22 trade-ins. Type: Pistol Action: Semi-Automatic Caliber: 9mm Capacity: 15 Year introduced: 2010, Austria Weight: 25.59 oz Overall length: 7.32" Status: Discontinued Intended use: Service, Duty, Home Defense