The Model 642 Airweight is the stainless-cylinder aluminum-frame J-frame with a fully concealed internal hammer, making it one of the most popular pocket revolvers in America. The stainless cylinder on the aluminum frame provides a corrosion-resistant combination that outlasts the all-aluminum Airweight models. The double-action-only operation eliminates the external hammer snag point. Type: Revolver Action: Double-Action Caliber: .38 Special Capacity: 5 Year introduced: 1990, USA Weight: 15 oz Overall length: 6.31" Status: Active Intended use: Concealed Carry, Backup, Law Enforcement