The Model 340 Airlite Centennial is a hammerless J-Frame .357 Magnum with an aluminum/titanium construction that keeps the loaded weight under 14 ounces. It combines the most powerful practical cartridge in the J-Frame with the lightest possible construction. Type: Revolver Action: Double-Action Caliber: .357 Magnum Capacity: 5 Year introduced: 2000, USA Weight: 12 oz Overall length: 6.25" Status: Active Intended use: Carry, Concealed Carry