# Diamondback DB15 Tactical .300 AAC Blackout 10" Rifle - Optic Ready

**Brand:** Diamondback Firearms
**Category:** Semi-Automatic Rifles
**Caliber:** .300 AAC Blackout

## Specifications

- **Caliber:** .300 AAC Blackout
- **Barrel Length:** 10"
- **Capacity:** 28 rounds
- **Finish:** Black Nitride
- **Weight:** 86.4 oz
- **Overall Length:** 26"
- **UPC:** 810035755604
- **SKU:** UCEGBnTkK

## Description

The Diamondback DB15 in .300 AAC Blackout is a direct impingement semi-automatic built on a 7075-T6 aluminum receiver, finished in black. With a 10-inch barrel and 26" overall length, it's built around the .300 BLK's strengths, a cartridge that runs both supersonic and subsonic loads effectively, and that can be suppressed without requiring a separate upper.

### Key Specifications
- **Brand**: Diamondback
- **Model**: DB15
- **Caliber**: .300 AAC Blackout
- **Barrel Length**: 10"
- **Capacity**: 28+1 Rounds
- **Weight**: 5.40 lbs
- **Overall Length (OAL)**: 26"
- **Action**: Semi-Automatic
- **Sights**: Optic Ready
- **Receiver Material**: 7075-T6 Aluminum
- **Stock Material**: Aluminum
- **Finish Color**: Black
- **Grip Type**: Magpul
- **Muzzle Device**: A2 Flash Hider

### Detailed Features
The optic-ready flat top accepts red dots and scopes directly. The Magpul grip is comfortable and well-established, no surprises there. The 7075-T6 aluminum receiver keeps weight at 5.40 lbs, which is light for the caliber and configuration. Direct impingement is simple to clean and maintain.

The .300 BLK chambering is the defining choice here. Supersonic loads perform comparably to 7.62x39 at short range; subsonic loads with a suppressor are a different use case entirely. The 10-inch barrel is well-matched to the cartridge. .300 BLK was designed partly around shorter gas systems.

### Usage Scenarios
- Suppressed use, where .300 BLK subsonic loads shine and the short barrel avoids excessive overall length with a can attached
- Home defense, where the compact size and 28+1 capacity are practical
- Range use with both supersonic and subsonic loads to compare the two operating modes

## Frequently Asked Questions

**Q: What caliber is the Diamondback DB15?**

A: This DB15 is chambered in .300 AAC Blackout.

**Q: Who makes the DB15?**

A: The DB15 is made by Diamondback.

**Q: What is the barrel length of the Diamondback DB15?**

A: It has a 10-inch barrel.

**Q: How many rounds does the Diamondback DB15 hold?**

A: It has a 28+1 capacity.

**Q: Is the Diamondback DB15 optic-ready?**

A: Yes. The flat top receiver accepts red dots and scopes directly without an adapter.

**Q: What receiver material does the Diamondback DB15 use?**

A: The receiver is 7075-T6 aluminum with a black finish, and the grip is Magpul.

**Q: Where can I buy the Diamondback DB15?**

A: Compare current vendor offers on this page.

## What Reviewers Say

*Quoted verbatim from YouTube reviews. Each link opens the video at the moment quoted.*

> I think this is probably one of my favorite guns that I own it's the db15 by Diamondback and this thing is just a beast.
>
> — [Johnny Q](https://www.youtube.com/watch?v=5-f6l9Wlhe0&t=2s)

## What Customers Say

*AI-generated insights from customer reviews*

The DB15 in .300 AAC Blackout draws its core user base from shooters who specifically want the .300 BLK platform. And that community tends to be knowledgeable about the caliber's strengths and limitations. The compact size, light weight, and dual supersonic/subsonic capability get consistent praise.

Value is a recurring positive. Buyers report it delivers the core AR features (optic-ready receiver, Magpul grip, solid aluminum construction) at a price that competes well with comparable platforms.

Reliability concerns appear in some reviews, particularly around consistency with certain ammo types. Component quality is generally rated as good for the price point, though some owners note it doesn't match premium builds. Buyers who plan to use it in critical applications are advised to run a thorough test with their chosen load before depending on it.

Discussions frequently cover suppressor compatibility, subsonic ammo selection, and potential upgrades for accuracy or ergonomics, topics that reflect the typical .300 BLK owner's interests.

## Pricing

**7 offers available**

| Vendor | Price |
|--------|-------|
| Classicfirearms Com | $605.56 |
| Shootingsurplus Com | $607.68 |
| Kygunco Com | $615.85 |
| Impactguns Com | $619.29 |
| Buds Gun Shop | $624.49 |
| Grabagun Com | $665.00 |
| Guns Com | $689.99 |

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*Data from [GunsNation](https://gunsnation.com)*