Gen4 G17 introduced the modular backstrap system, reversible and enlarged magazine catch, dual recoil spring assembly, and RTF4 grip texture. Refined ergonomics over Gen3 for a wider range of hand sizes. Widely adopted by law enforcement transitioning from Gen3. Type: Semi-Auto Pistol Action: Striker-Fired Caliber: 9mm Capacity: 17 Year introduced: 2010, Austria Weight: 25.17 oz Overall length: 7.32" Status: Active Military use: Yes Intended use: Service, Law Enforcement, Military