The Security-Six in 9mm is a rare variant that chambers the rimless 9mm cartridge using full-moon clips. Produced in limited quantities for law enforcement agencies that wanted 9mm ammunition compatibility in a revolver. The same frame as the .357 Magnum Security-Six, distinguished by the moon clip requirement and 9mm headspace. Type: Revolver Action: Double-Action Caliber: 9mm Capacity: 6 Year introduced: 1974, USA Weight: 33.5 oz Overall length: 9.25" Status: Discontinued Intended use: Law Enforcement