Diamondback SDR-A
- Category
- Revolver
- Barrel
- 51 mm
- Weight, empty
- 442 g
- Introduced
- 2026
About
What it is, and why it matters
The Diamondback SDR-A is a lightweight six-shot snub-nose revolver introduced in 2026, chambered for .38 Special +P. It uses a forged 7075-T6 aluminum frame paired with a stainless-steel barrel and cylinder to reach an unloaded weight of just 15.6 ounces, making it one of the lightest production revolvers in any caliber. The SDR-A is the first model in the SDR line to feature a fully enclosed hammer, giving it completely snag-free double-action-only operation ideal for pocket and concealed carry, and it ships with fiber-optic front and rear sights and a push-button cylinder release.
Diamondback shaved the SDR-A down to 15.6 ounces by forging the frame from 7075-T6 aircraft-grade aluminum while keeping the barrel and cylinder in stainless steel, packing six rounds of .38 Special +P into a revolver lighter than many five-shot snubbies.
Aluminum-framed evolution of the stainless steel Diamondback SDR. Capacity of six rounds gives one more than a typical five-shot snub. MSRP approximately $614 at launch.
Specification
Everything measured
IdentityWhat it is, who built it and when.
- Manufacturer
- Diamondback Firearms
- Category
- Revolver
- Country
- United States
- Status
- In production
- Produced
- 2026
DimensionsAs issued, without a magazine or an optic.
- Barrel
- 51 mm
- Overall length
- 170 mm
- Weight, empty
- 442 g
ActionHow it cycles, what trips it, and what feeds it.
- Action
- Double action revolver
- Firing mechanism
- Double action only
- Trigger
- Double action
- Trigger pull
- 44.0 N
- Capacity
- 6
- Magazine
- Revolving cylinder
MaterialsEach swatch is the material itself, not a colour chosen to stand for it.
- Frame
- Aluminum
- Barrel
- Stainless steel
- Finish
- Matte
BallisticsFrom the service cartridge, not a handload.
- Muzzle velocity
- 290 m/s
- Muzzle energy
- 340 J
- Effective range
- 25 m
Trajectory
What the round does downrange
Solved from the muzzle figures and the bullet. The dashed rule is the effective range on the record, and the crosses are the steps the solver returned.
No load solved for this record yetThe flight path is computed from a cartridge and a bullet. This record has no ammunition filed against its chambering, so there is nothing to solve.
Features
What it has
What the record lists as fitted, drawn from the catalogue.
Enclosed hammer
Forged 7075 t6 aluminum frame
Stainless cylinder
Fiber optic front sight
Fiber optic rear sight
Push button cylinder release- Snag free
Standing
How it compares
Each figure against the firearms of the same type and cartridge that record it, or of the same type where that cartridge has too few. Positions are read to the nearest tenth.
| Measurement | This firearm | Median | Position |
|---|---|---|---|
| Empty weightAmong 404 revolvers | 442 g | 1.05 kg | Lighter than about 90% |
| Overall lengthAmong 415 revolvers | 170 mm | 260 mm | Shorter than about 90% |
| Barrel lengthAmong 431 revolvers | 51 mm | 127 mm | Shorter than about 90% |
| Magazine capacityAmong 434 revolvers | 6 | 6 | Holds more rounds than about 60% |
Answers
Questions about the Diamondback SDR-A
How much does the Diamondback SDR-A weigh?
The Diamondback SDR-A weighs 442 g (15.6 oz) empty.
What caliber is the Diamondback SDR-A?
The Diamondback SDR-A is chambered in .38 Special.
How many rounds does the Diamondback SDR-A hold?
The Diamondback SDR-A holds 6 rounds, fed from a revolving cylinder.
How long is the Diamondback SDR-A?
The Diamondback SDR-A is 170 mm (6.69 in) long overall, with a 51 mm (2.01 in) barrel.
Who makes the Diamondback SDR-A?
The Diamondback SDR-A is made by Diamondback Firearms (United States).
When was the Diamondback SDR-A introduced?
The Diamondback SDR-A was introduced in 2026.
How does the Diamondback SDR-A operate?
The Diamondback SDR-A uses a double action, and its firing mechanism is double action only.
Compatibility
Which parts fit this firearm
Studio
Every part that mounts on this, resolved
Not a list the maker typed out: the answer comes from the mounts this firearm exposes and the interface each part needs, so it stays right when either one changes.
- Every part that mounts on any firearm in the catalogue
- Interface standards, platforms and fit overrides
- The same answers through the API and the MCP server
Requires a signed-in GunSpec account on the Studio plan. The answer is computed per part, so it is not part of the public record.
Provenance
What the record holds
Every figure above was taken from one of these pages. The confidence reflects how much of the record came from a page a claim can be checked against.
Provenance
Confidence in this record
70%
Stockists
Where to buy
Offers link straight to the shop. GunSpec never takes the order.
No shop has listed this firearm yet
Stock and prices come from the shops themselves. If you sell this firearm, you can list it and it appears here.
List a firearmMCP
Ask an assistant about it
The same record, reached the way a person asks for it rather than the way a program does.
Ask GunSpec
Works with
Point an MCP client at GunSpec and it answers from the catalogue rather than from memory. A free key covers the read tools.
API
The call that returns this record
The same fields, in the same units, from the same endpoint the page reads.
curl --request GET \ --url 'https://api.gunspec.io/v1/firearms/diamondback-sdr-a' \ --header 'X-API-Key: your_key'{ "id": "diamondback-sdr-a", "name": "Diamondback SDR-A", "manufacturer": { "id": "diamondback", "name": "Diamondback Firearms", "countryCode": "US", "foundedYear": 2009, "website": "https://www.diamondbackfirearms.com", "logoUrl": null, "description": null, "status": null, "defunctYear": null, "stateOwned": null, "makesFirearms": null, "parentId": null, "predecessorId": null, "createdAt": "2026-02-18 03:40:42", "updatedAt": "2026-02-18 03:43:46", "version": "245a4d5f5ffc5204ba388fe1b03065815b2895500ff4836d15d9cb1c2935e92f" }, "category": { "id": "revolver", "name": "Revolver", "description": "Handguns with a revolving cylinder containing multiple chambers" }, "country_of_origin": "US", "year_introduced": 2026, "barrel_length_mm": 51, "weight_empty_g": 442, "action_type": "double_action_revolver"}