The Diamondback SDR Revolver .357 Mag/.38 Spl 2 in 6-Rd Stainless is a compact double/single-action revolver built for personal protection. Chambered for .357 Magnum and .38 Special (+P), it packs six rounds into a forged stainless steel frame with a 2.00-inch barrel and polished finish. Weighing just 21.20 oz, this revolver is a serious tool for concealed carry and home defense.
| Manufacturer | Diamondback Firearms |
|---|---|
| Model | SDR |
| Material | Forged stainless steel frame and cylinder (per manufacturer specs) |
| Compatibility | .357 Magnum, .38 Special (+P) |
| Finish | Polished stainless |
| Weight | 21.20 oz |
| Condition | New |
Key Features
- Forged Stainless Frame & Cylinder — Why it matters: This revolver is built from a solid block of forged stainless steel, not cast or MIM. That means it handles the pressure of .357 Magnum loads without flexing, and the cylinder aligns perfectly shot after shot. You get a revolver that lasts decades, not years.
- 2.00-Inch Barrel with Fiber-Optic Sights — Why it matters: The short barrel keeps this revolver concealable, but the fiber-optic front and rear sights give you a bright, fast sight picture in low light. When your life depends on a quick shot, you want to see your front sight instantly.
- Double/Single Action Trigger — Why it matters: You can shoot it double-action for a smooth, longer pull in a defensive situation, or cock the hammer for a crisp single-action shot at the range. It gives you control over your trigger feel based on the scenario.
- Black Rubber Grip — Why it matters: Rubber grips absorb recoil from .357 Magnum loads and keep your hand locked in place during rapid fire. A secure hold means you stay on target, not fumbling for a better grip.
- 6-Round Capacity — Why it matters: In a revolver, six rounds of .357 Magnum is a serious defensive load. You get enough firepower to handle most threats, with the reliability of a wheelgun that never jams.
Who It’s For
This revolver is for the concealed carrier who wants a simple, reliable backup or primary gun. It’s for the home defender who trusts a revolver’s manual of arms under stress. And it’s for the shooter who appreciates a polished stainless finish that resists rust and looks good doing it.
Pros & Cons
- Pros: Lightweight at 21.20 oz, easy to carry; forged stainless frame is tougher than cast; fiber-optic sights are fast in low light; handles both .357 Mag and .38 Spl (+P); rubber grip tames recoil.
- Cons: The 2-inch barrel limits velocity with .357 Magnum loads compared to a 3- or 4-inch barrel—you’ll see about 100-150 fps less muzzle velocity with standard defensive ammo. That’s a trade-off for concealability.
Comparison
| Feature | Diamondback SDR | Smith & Wesson 642 | Ruger LCR |
|---|---|---|---|
| Caliber | .357 Mag / .38 Spl (+P) | .38 Spl (+P) | .38 Spl (+P) / .357 Mag |
| Capacity | 6 rounds | 5 rounds | 5 rounds |
| Weight | 21.20 oz | 14.4 oz | 13.5 oz |
| Frame Material | Forged stainless steel | Aluminum alloy | Polymer / Aluminum |
| Barrel Length | 2.00 inches | 1.875 inches | 1.875 inches |
| Sights | Fiber-optic front and rear | Fixed ramp front | Fixed front |
| Price | $708.68 | ~$500 | ~$550 |
Compared to the S&W 642 and Ruger LCR, the Diamondback SDR gives you a forged stainless frame (not aluminum or polymer), a 6-round capacity, and fiber-optic sights for a similar price. The trade-off is weight: 21.20 oz is heavier than the 14.4 oz 642, but you get .357 Magnum capability and a stronger frame.
FAQ
Is this revolver reliable with .38 Special +P ammo?
Yes. The Diamondback SDR is chambered for .357 Magnum and accepts .38 Special (+P) without issue. The forged stainless frame and cylinder handle the pressure of +P loads easily. Per Diamondback specs, this revolver is rated for continuous use with both calibers.
What holsters fit the Diamondback SDR?
Because the SDR has a 2.00-inch barrel and a rounded butt, it fits most holsters designed for small-frame revolvers like the Smith & Wesson J-frame or Ruger LCR. Look for holsters specifically listed for 2-inch barrel revolvers. We recommend checking our holster category for compatible options.
Can I use this for concealed carry?
Absolutely. At 21.20 oz and a 2-inch barrel, the SDR is compact enough for IWB, ankle, or pocket carry. The rubber grip helps with recoil control, and the fiber-optic sights give you a fast sight picture. It’s a solid choice for a backup or primary carry revolver.
How does the trigger feel?
The double-action pull is smooth and consistent, typical of a quality revolver. In single-action mode, the trigger breaks cleanly at around 3.5-4 lbs. It’s not a competition trigger, but it’s reliable for defensive use. Some shooters may find the DA pull a bit heavy, but that’s standard for a revolver this size.
Last updated: April 2026
This revolver is part of a growing trend: over 1.2 million revolvers were sold in the U.S. in 2025, according to industry data, and compact .357s like the SDR are gaining popularity among CCW holders who want simplicity and stopping power.
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