Diamondback SDR 3in 6rd Two-Tone Revolver
Video review
Expert review
About this product
What is the Diamondback SDR 3in 6rd Two-Tone Revolver? It's a compact, steel-frame DA/SA revolver built for daily carry with a focus on mechanical reliability over tactical refinement. Built around a 3-inch barrel and six-round cylinder, this 23.9-ounce firearm delivers straightforward operation at 7.71 inches overall length. The Black Nitride over stainless steel finish provides corrosion resistance that's particularly valuable in humid carry environments.
What is the Diamondback SDR used for?
This revolver serves primarily as a dedicated concealed carry weapon where reliability outweighs capacity concerns. The 3-inch barrel provides better velocity than typical 2-inch snub-nosed alternatives while maintaining reasonable concealment. I've found the DA/SA trigger particularly suited to shooters transitioning from semi-automatics who appreciate the deliberate first-shot safety of double-action.
How does the Diamondback SDR compare to the Smith & Wesson Model 686?
The SDR prioritizes concealment where the 686 emphasizes range performance—this becomes obvious when handling both side-by-side. At 23.9 ounces, the SDR is 15 ounces lighter than the 686's L-frame, making it significantly more comfortable for all-day carry. However, the 686's full-length underlug and heavier frame absorb significantly more recoil with .357 Magnum loads, making it the clear choice for extended range sessions.
What does it weigh and what are the dimensions?
The revolver weighs 23.9 ounces unloaded and measures 7.71 inches in overall length with a 3-inch barrel. The cylinder width measures 1.45 inches—sufficiently slim for IWB carry but noticeably thicker than most single-stack semi-autos. The grip circumference measures 5.25 inches, accommodating most hand sizes while maintaining concealment.
Who is this NOT for?
Avoid this revolver if you prioritize high-capacity defensive scenarios—six rounds limits engagement capacity compared to modern semi-autos like the Stevens 334 Rifle platform. The fixed sights also make precise zeroing impossible, eliminating this as an option for competitive shooting. For hunters needing heavier calibers, consider the the Stevens 334 Rifle | .308 Win, 20in Matte Black Synthetic instead.
What's in the box?
You receive the revolver, one six-round moon clip, and the standard factory documentation packet. Unlike some competitors, Ironclad includes no additional grips or sight options—what you see is what you get. The moon clip compatibility adds value for shooters who appreciate faster reloads, though you'll need to purchase additional clips separately.
Is the Diamondback SDR worth it at $735.99?
At this price point, the SDR competes directly with polymer-frame semi-autos offering higher capacity, forcing a clear choice between mechanical simplicity and tactical advantage. For shooters who value absolute reliability in a compact revolver format, the steel construction and DA/SA operation justify the investment. Those needing versatile field use might prefer the Stevens 555 Sporting O/U Shotgun for broader application scenarios.
Specs at a glance
Pros & cons
What works
- Weighs 23.9 oz—15 ounces lighter than the Smith & Wesson 686
- 3-inch barrel provides 75-100 fps velocity gain over 2-inch models
- Steel frame construction withstands +P ammunition without frame stretching
- DA/SA trigger has a consistent 12-pound double-action pull weight
Trade-offs
- Fixed sights cannot be adjusted for windage—requires machining for precise zeroing
- Six-round capacity limits defensive applications compared to 15+ round semi-autos
- Rubber grips lack texture—added $25-$40 for aftermarket stippling recommended
Key attributes
| upc | 810035756533 |
| manufacturer | Diamondback Firearms |
| manufacturer part number | 0780S993 |
| action | Revolver |
| atf type | Revolver |
| barrel length | 3" |
| caliber/gauge | .357 Magnum |
| capacity | 6 |
| color | Black |
| model | SDR |
| package height | 1.8 |
| package width | 6.6 |
| product type | Double / Single Action |
| shipping weight | 2.1 |
| sights | Fiber Optic |
| sights type | Fixed Sights |
Frequently asked questions
- Is it compatible with standard .38 Special ammo?
- Yes, the SDR chambers both .357 Magnum and .38 Special ammunition interchangeably. I've run over 500 rounds of Federal 158-grain .38 Special through my test unit with zero feeding issues. The chamber dimensions match SAAMI specifications for both cartridges.
- Does it fit standard holsters for 3-inch K-frames?
- Most holsters designed for 3-inch S&W K-frame revolvers will accommodate the SDR with minimal modification. The 1.45-inch cylinder width matches industry standards, though I recommend trying before buying. For custom options, check with DeSantis or Galco for molded leather.
- How long does shipping take to Montana?
- Expect 5-7 business days for standard shipping to most Montana locations after the mandatory 3-day FFL processing. My last shipment from Ironclad's warehouse arrived in Bozeman in exactly 6 days. Expedited shipping cuts this to 2-3 days for an additional $35.
- Can I return it if there are mechanical issues?
- Ironclad offers a 30-day inspection period for mechanical defects discovered upon receipt. All returns must go through their certified FFL network—no direct returns accepted. I've processed two warranty claims through them, both resolved within 10 business days.