This 640 sports stocks that offer a three-fingered rubber grip. But you can switch to a two-fingered rubber boot grip for better concealability. Or you can dress up a J-frame with custom wood stocks. Or install the DeSantis Clip Grip, which allows you to carry the gun tucked into your waistband, no holster, something many experts will argue against. Or replace the stocks with a Hyskore Grip-Lite which, when you grasp the stocks, floods the area in front of the barrel with a brilliant light, illuminating a target. Those are just a few of a seemingly endless array of stocks available for a J-frame, most of which require nothing more than removing a single screw to replace.