The 4" Model 27 is the compact service variant of the original .357 Magnum revolver. Law enforcement agencies that wanted the power of the .357 Magnum with a shorter, more portable barrel selected the 4" configuration. Type: Revolver Action: Double-Action Caliber: 357 Magnum Capacity: 6 Year introduced: 1935, USA Weight: 41 oz Overall length: 9.5" Status: Active Intended use: Service / Law Enforcement