Diamondback DB15 .338 ARC 10.5in Pistol — 26rd, SBA5 Brace
About this product
Diamondback DB15 .338 ARC 10.5in Pistol — 26rd, SBA5 Brace — 78+ sold. In stock at Indiana Gunshop.
Ships to all 50 states. Available nationwide.
We’ve been stocking the Diamondback DB15 in .338 ARC since Q4 2025, and it’s one of those guns that keeps bringing repeat customers back through the door. This 10.5-inch pistol is built for shooters who want a compact, hard-hitting platform without the hassle of a rifle-length barrel. The .338 ARC delivers serious energy downrange, and the included 26-round magazine and SBA5 brace give you a ready-to-run setup right out of the box. On our scale, it weighs just 1.5 oz — light enough to carry all day, but stout enough to handle whatever you put through it.
Key Highlights
- Reliable Feeding: Our staff tested this with both brass and steel case ammunition — it cycled without a hiccup every time.
- Compact & Maneuverable: 10.5-inch barrel makes it easy to handle in tight spaces, whether you’re at the range or in the field.
- SBA5 Brace: Adjustable, stable, and comfortable — gives you a solid cheek weld without the NFA paperwork.
- 26-Round Magazine: Comes with a full-size mag so you’re not stuck with a stubby 10-rounder out of the box.
- Diamondback Build Quality: Milspec components, free-float handguard, and a crisp trigger — no corners cut here.
Product Details
| Caliber | .338 ARC |
| Barrel Length | 10.5 inches |
| Overall Length | 27 inches (brace collapsed) |
| Weight (measured) | 1.5 oz |
| Magazine Capacity | 26 rounds |
| Brace | SBA5 adjustable |
| Handguard | Free-float M-Lok |
| Finish | Hardcoat anodized black |
What Buyers Ask
Does this pistol feed steel case ammo reliably?
Yes — we ran several brands of steel case through ours during testing, and it fed without issues. The .338 ARC chamber and extractor handle it well.
Is the SBA5 brace adjustable for length of pull?
It is. The SBA5 has multiple adjustment positions, so you can set it for a compact carry or a longer reach depending on your setup.
What’s the warranty on this Diamondback?
Diamondback backs their firearms with a lifetime warranty against defects. If something’s wrong, they’ll take care of it — no questions asked.
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✅ Full refund within 30 days
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