Smith & Wesson J-Frame is a small-frame, defense revolver designed to fire a full power round and is reliable. The Model 317 is part of the AirWeight series of revolvers. Built on an aluminum-alloy J-frame it is lightweight and small enough to be carried inside a hunter or fisherman's kit bag. This model has a stainless steel 3" barrel, aluminum alloy frame and cylinder, and a Hi-Viz fiber optic front and adjustable rear sight.