The 3-inch Airweight Model 37 combined the weight savings of the aluminum frame with enough barrel length for improved practical accuracy. It was issued to federal agents and officers who needed an extremely lightweight sidearm for all-day carry. Type: Revolver Action: Double-Action Caliber: .38 Special Capacity: 5 Year introduced: 1952, USA Weight: 15.5 oz Overall length: 8" Status: Discontinued Intended use: Carry, Plainclothes