The Model 442 Centennial Airweight is essentially the matte-finished variant of the 642, featuring an aluminum frame with a carbon steel cylinder. The non-stainless cylinder distinguishes it from the 642 and provides a slightly different corrosion profile. Type: Revolver Action: Double-Action Only Caliber: 38 Special +P Capacity: 5 Year introduced: 1993, USA Weight: 15 oz Overall length: 6.3" Status: Active Intended use: Concealed Carry