Description
Most small-frame carry revolvers make you settle for five rounds. The Diamondback SDR doesn't. This American-made wheelgun squeezes a sixth chamber into a package that still fits J-frame holsters and grips, and it does it with a frame, barrel, and cylinder all machined from stainless steel. This particular model is the double action only version with a bobbed hammer, which means nothing to catch on a cover garment and a consistent trigger pull every single time. At 21.2 ounces empty, it has enough heft to soak up recoil without weighing down your belt.
What Sets the SDR DAO Apart
The trigger is the headline here. Diamondback tuned it to run between 9 and 11.5 pounds with zero stacking, and it breaks clean instead of piling up resistance at the end like a lot of older snubbies do. Reviewers keep calling it one of the best double action pulls in the small revolver class, and after running one, it's hard to argue. Up top you get a fixed orange fiber optic front sight and a low-profile green fiber optic rear set in a dovetail, giving you a bright, high-contrast picture that plain gutter sights can't touch in dim light. The glass bead stainless finish keeps things subtle while shrugging off sweat and holster wear, and the Hogue rubber grip takes the sting out of stouter loads.
Living With the Diamondback SDR
A few smart touches make this revolver easy to own. The push-button cylinder release sits right where your thumb wants it, chambers are chamfered for quicker loading, and a second button on the frame lets you pull the entire cylinder assembly off for cleaning without tools. Since it's chambered for .357 Magnum, you can also run .38 Special or +P ammo, which makes range days a lot more pleasant. Practice with soft-shooting .38s, load up hotter defensive rounds when it goes in the holster, and you've covered all the bases with one gun.
Key Specifications
- Manufacturer: Diamondback Firearms
- Model: SDR (Self Defense Revolver)
- Manufacturer Part Number: DB0700S712
- UPC: 810035756663
- Action: Double Action Only (bobbed hammer)
- Caliber: .357 Magnum / .38 Special +P
- Capacity: 6 rounds
- Barrel Length: 2 inches
- Frame Material: Forged stainless steel
- Finish: Glass bead stainless
- Sights: Fixed orange fiber optic front, dovetail green fiber optic rear
- Grip: Hogue black rubber with Diamondback logo
- Trigger Pull: 9 to 11.5 lbs, non-stacking
- Overall Length: 6.53 inches
- Height: 4.44 inches
- Weight (Unloaded): 21.2 oz
What’s Included
- Diamondback SDR DAO revolver
- Black zippered soft pistol case
- Cable lock
- Owner's manual
Frequently Asked Questions
Can the Diamondback SDR DAO shoot .38 Special ammo?
Yes. Since it's chambered in .357 Magnum, it will safely run .38 Special and .38 Special +P as well. A lot of owners practice with milder .38s to keep range sessions comfortable, then carry hotter +P or magnum loads for defense.
What is the button on the right side of the frame for?
That's the cylinder assembly release. With the cylinder swung open, pressing it lets you slide the entire cylinder and crane off the frame with no tools, which makes deep cleaning a whole lot easier than fiddling with a yoke screw like on most revolvers.
Will the SDR fit J-frame holsters and grips?
For the most part, yes. The grip frame is sized like a Smith & Wesson J-frame, so most J-frame grips will fit, and the gun works in the majority of leather J-frame holsters. Molded Kydex holsters can be pickier since the SDR's cylinder houses six rounds instead of five, so check fitment on those.
Does this DAO model have a hammer you can cock back?
No, this version has a bobbed hammer and fires in double action only. Every trigger pull is the same consistent 9 to 11.5 pound stroke, and the smooth, non-stacking pull makes it easy to shoot well. The upside is a snag-free profile that draws cleanly from concealment.




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