The Model 37 Airweight is the aluminum-frame variant of the Model 36 Chief's Special, introduced two years after the steel original. The aluminum alloy frame reduces weight by approximately 6 ounces, making it significantly more comfortable for all-day carry at the cost of slightly increased felt recoil. Standard plainclothes and off-duty carry for generations of law enforcement officers. Type: Revolver Action: Double-Action Caliber: .38 Special Capacity: 5 Year introduced: 1952, USA Weight: 13.5 oz Overall length: 6.375" Status: Discontinued Intended use: concealed_carry, backup, law_enforcement, collector