The standard 1.875" barrel Model 37 Chief's Special Airweight is the most common configuration of this lightweight exposed-hammer J-Frame. The aluminum alloy frame reduces weight to approximately 13 oz, making it one of the original ultralight carry revolvers. Type: Revolver Action: Double-Action Caliber: 38 Special Capacity: 5 Year introduced: 1952, USA Weight: 13.5 oz Overall length: 6.3" Status: Discontinued Intended use: Concealed Carry / Backup