The Diamondback SDR is a double-action revolver chambered in 9mm with a 2-inch barrel and a 6-round cylinder. It has a stainless steel construction with a glass bead finish and rubber grips. Sights include a fiber optic rear sight for quick target acquisition. 
 

Key Specifications 

• Brand: Diamondback 
• Model: SDR 
• Caliber: 9mm 
• Action: Double Action 
• Capacity: 6 rounds 
• Barrel Length: 2 inches 
• Color/Finish: Stainless Steel, Glass Bead Finish 
   

Detailed Features 

• Stainless steel frame and cylinder with glass bead surface finish 
• 2-inch barrel for compact carry 
• 6-round cylinder in 9mm 
• Fiber optic rear sight 
• Rubber grips

The Diamondback SDR in 9mm occupies an interesting spot as a compact revolver that uses a common semi-auto cartridge. Owners who want to consolidate ammunition across pistols and revolvers find this appealing, and the 9mm chambering produces manageable recoil in a revolver frame even with a 2-inch barrel. Availability of 9mm moonclips is a topic that comes up regularly in owner discussions.

Build quality impressions are generally positive for the price tier, with the glass bead stainless finish noted for a matte, non-reflective look that holds up to handling. The fiber optic rear sight is appreciated for a carry-sized gun, though some owners replace the front sight for a matched set. The rubber grips absorb recoil adequately but are not universally praised for feel.

The SDR is a relatively new entrant from Diamondback, and long-term durability data is still accumulating. Early owners report reliable function across various 9mm loads, with the occasional tight moonclip fit noted as something that smooths out after a few loading cycles. Trigger pull in double action is heavy, which is typical for a compact carry revolver.