Double-Action-Only (Internal hammer)
The Smith & Wesson Model 642 "Airweight" is an alloy-framed double-action revolver built on Smith & Wesson's popular J-frame.
Its "hammerless" design and smooth finish makes it easy to draw this revolver from concealment, or even to fire it from inside a pocket. These
features along with its small size and light weight make the 642 a very popular choice for personal protection.