The Colt Thunderer Revolver .41 Colt is a usa-made double-action revolver chambered in .41 Colt, introduced in 1877. Primary use: self_defense, law_enforcement. Type: Revolver Action: Double-Action Caliber: .41 Colt Capacity: 6 Year introduced: 1877, USA Weight: 37 oz Overall length: 9.5" Status: Discontinued Intended use: self_defense, law_enforcement