The Diamondback Firearms SDR is a compact double-action revolver chambered in .357 Magnum and compatible with .38 Special +P. It features a 2-inch stainless steel barrel, six-round swing-out cylinder, low-profile fiber optic sights, and weighs 21.2 ounces for concealed carry. Crafted from premium stainless steel with Hogue rubber grips and push-button cylinder release, the SDR combines reliability and concealability for personal defense.