The Diamondback SDR is a revolver chambered in .357 Magnum and .38 Special +P with a 3-inch stainless steel barrel. It has a 6-round cylinder, DA/SA operation, fiber optic sights, and a black rubber grip. The polished stainless construction is standard on this configuration. 
 

Key Specifications 

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

Detailed Features 

• 3-inch polished stainless steel barrel 
• DA/SA operation 
• Fiber optic sights 
• Black rubber grip (Hogue) 
• 6-round cylinder

Owners of the Diamondback SDR consistently mention the polished stainless finish as a visual standout. The combination of .357 Magnum chambering and a 3-inch barrel appeals to those wanting a compact but powerful revolver. Fiber optic sights are frequently cited as a practical advantage over traditional blade sights at this price point.

The DA/SA action gives the SDR flexibility for different shooting scenarios. The double-action trigger pull is acceptable for defensive use, while single-action cocking allows more deliberate shots at the range. The Hogue rubber grip is well-regarded for absorbing recoil, particularly with full-power .357 Magnum loads through the short barrel.

The SDR sits in a competitive segment of the compact revolver market. Trigger smoothness is an area where owner opinions split, with some finding it acceptable for carry and others preferring a professional trigger job. Value is generally considered reasonable given the fiber optic sights and the polished stainless construction included at the price.