Smith & Wesson J-Frame revolver is designed to fire a full power round and is as simple and easy to use as it is reliable. The Model 340 PD is a variation of the M40 Centennial AirLite which integrates the time-tested features of the original with modern advancements. This model has an matte black scandium alloy frame, Titanium alloy cylinder, black stainless steel barrel, red ramp front and fixed rear, external hammer, and a no internal lock.