Medium-frame, duty-type weapon suitable for target work. Has a short frame of Detective Special, with ventilated rib 2.5", 4" or 6" barrel. Chambered for .38 Special and .22 rimfire for target shooters. Finish blued or nickel-plated, with checkered walnut grips. Diamondback features adjustable target sights, wide target hammer and steel frame. Manufactured between 1966 and 1986. Very few Diamondbacks were chambered for .22 WMR. Another premium should be added for these models. Since fakes exist, a factory letter documenting this chambering is strongly advised. NOTE: Premium of 100 percent for 2.5" barrel or nickel finish in .22 LR caliber; 20 percent in .38 Special.