The Diamondback Firearms(R) SDR is a six-shot double-action/single-action revolver chambered in 357 Magnum and compatible with 38 Special +P. This configuration features a 3-inch stainless steel barrel a forged stainless steel frame with a glass bead finish and a black Hogue Monogrip.Key FeaturesStainless Construction: Stainless steel barrel and cylinder paired with a forged stainless steel frame.Dual-Caliber Compatibility: Accepts 357 Magnum and 38 Special +P ammunition.Fiber-Optic Sights: Fixed orange front sight and low-profile dovetail green rear sight.Action: Supports double-action and single-action operation.Grip: Black Hogue Monogrip provides a textured gripping surface.Capacity: Six-round cylinder.Diamondback Firearms(R) builds American-made AR-platform firearms focused on dependable function and practical feature sets. The brand is known for pairing common compatibility with modern rails optics-ready uppers and value-forward configurations across multiple finishes and trim levels. Diamondback rifles are designed for consistent performance for training and range use with familiar controls and straightforward maintenance.