Gen 4 G27 adds RTF2 texture, dual recoil spring, reversible enlarged magazine release, and interchangeable backstraps. Maintains full compatibility with G22/G23 double-stack .40 S&W magazines. Type: Pistol Action: Semi-Automatic Caliber: .40 S&W Capacity: 9 Year introduced: 2012, Austria Weight: 19.75 oz Overall length: 6.41" Status: Active Intended use: Backup Duty Pistol, Concealed Carry, Law Enforcement