The Diamondback SDR is a 6-shot revolver chambered in .357 Mag and .38 Special +P with a 3-inch polished stainless steel barrel. The cylinder and frame are polished stainless steel, and the exposed hammer allows single or double action operation. A Hogue wood grip is standard. 
 

Key Specifications 

• Brand: Diamondback 
• Model: SDR 
• Caliber: .357 Mag / .38 Special +P 
• Action: Double Action 
• Capacity: 6 rounds 
• Barrel Length: 3 in 
• Finish: Polished Stainless Steel 
   

Detailed Features 

• 3-inch polished stainless steel barrel 
• Polished stainless steel cylinder and frame 
• Exposed hammer for single or double action use 
• Hogue wood grip 
• 6-round cylinder

Owners of the SDR appreciate the polished stainless finish, which holds up outdoors and is straightforward to clean. The Hogue wood grip draws mixed comments, with some preferring it at the range while others swap it for rubber after extended shooting.

The 3-inch barrel makes the SDR a compact .357 Mag option, but the shorter tube brings more noticeable muzzle blast compared to full-length revolvers. Cylinder lockup and trigger pull are common discussion points, and most report the double-action pull as acceptable out of the box.

Diamondback sits at a lower price point than traditional revolver names, and buyers willing to do a break-in generally find the SDR functional. Aftermarket support is thinner than for more established brands, which comes up often among those looking to customize.