The Ruger GP100 was issued to US Marshals Service deputies as a service revolver before the agency transitioned to semi-automatic pistols. Known for its exceptional durability and ability to fire thousands of .357 Magnum rounds without timing issues. Type: Revolver Action: Double/Single-Action Caliber: 357 Mag Capacity: 6 Year introduced: 1986, USA Weight: 40 oz Overall length: 9.69" Status: Active Intended use: Law Enforcement, Collector