Competition-tuned GP100 with a 4.2-inch semi-bull barrel, fiber-optic sights, and an action job from the factory — optimized for IDPA and action revolver competition. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 6 Year introduced: 2014, USA Weight: 38 oz Overall length: 9.5" Status: Active Intended use: Competition, Target