# Diamondback Carbon DB15 Pistol - .300 AAC, 10" Barrel, Semi-Auto

**Brand:** Diamondback Firearms
**Category:** Full Size Handguns
**Caliber:** .300 AAC Blackout

## Specifications

- **Caliber:** .300 AAC Blackout
- **Barrel Length:** 10"
- **Capacity:** 30 rounds
- **Finish:** Diamondback Black
- **Weight:** 91.2 oz
- **UPC:** 810035754393
- **SKU:** UCEGBnTQn

## Description

The Diamondback Carbon DB15 Pistol is a semi-automatic AR-pistol chambered in .300 AAC Blackout with a 10" barrel and Diamondback Black finish. The .300 BLK chambering distinguishes this variant from the 5.56 siblings. It handles both supersonic and subsonic loads, and the 5/8x24 threaded muzzle is sized for standard .30-cal suppressors.

### Key Specifications
- **Manufacturer:** Diamondback Firearms
- **Family:** Carbon Series
- **Model:** Carbon DB15 Pistol
- **Type:** Semi-Auto Pistol
- **Action:** Semi-Auto
- **Caliber/Gauge:** 300 AAC Blackout
- **Finish:** Diamondback Black
- **Barrel Length:** 10"
- **Rate of Twist:** 1-in-8
- **Capacity:** 30 + 1 rounds (includes one 30rd. PMAG)
- **Weight:** 5.7 lbs.
- **Receiver Material:** Forged 7075 T6 Aluminum 
- **Stock/Grips:** Magpul Pistol Grip 
- **Sight Type:** None (no sights included)
- **Thread Pattern:** 5/8x24 
- **Safety Features:** 2-position thumb safety 
  
### Detailed Features
At 5.7 lbs., this is slightly heavier than the 5.56 variants. .300 BLK components add a small amount of mass. The forged 7075 T6 aluminum receiver is the same across the Carbon Series line, providing a consistent structural baseline.

Magpul MOE Grip and SBA3 Brace are included. The SBA3 adjusts for arm length and folds. One 30-round PMAG ships with the gun.

The 5/8x24 thread pattern is correct for .30-caliber suppressors, which is the primary advantage of this configuration over the 5.56 variants for suppressed shooting. Subsonic .300 BLK runs quietly suppressed; supersonic loads work for standard range use.

### Usage Scenarios
- **Home Defense:** High-capacity magazine and compact form factor; .300 BLK subsonic loads reduce over-penetration compared to 5.56
- **Sport Shooting:** The lightweight build and semi-auto action work well for dynamic stages
- **Suppressed Use:** The 5/8x24 threaded barrel is optimized for .30-cal suppressors, and .300 BLK subsonic is one of the quieter suppressed rifle calibers

## What Customers Say

*AI-generated insights from customer reviews*

The Diamondback Carbon DB15 in .300 AAC Blackout gets generally positive feedback from owners who value its light weight and compact size. At 5.7 lbs. with a 10" barrel, it handles easily and the .300 BLK chambering is versatile: supersonic loads for range use, subsonic for suppressed applications.

Range performance with common ammunition is usually acceptable, and recoil is manageable. That said, a number of users have reported feeding or cycling issues with specific ammunition brands or bullet profiles. .300 BLK can be sensitive to ammo selection in some AR-platform pistols, and this gun appears to share that characteristic.

Build quality draws the same comparison to established brands that comes up across the DB15 line. Some owners feel it's a solid value; others think the components don't quite match what higher-priced options offer. Overall sentiment is cautiously positive. People who get a well-functioning example tend to be happy with it, but the reports of reliability issues are frequent enough to suggest testing thoroughly with your intended ammunition before relying on it.

## Pricing

**12 offers available**

| Vendor | Price |
|--------|-------|
| Shootingsurplus Com | $656.95 |
| Kygunco Com | $678.00 |
| Guns Com | $678.99 |
| Impactguns Com | $681.79 |
| Buds Gun Shop | $686.49 |
| Globalordnance Com | $690.00 |
| Grabagun Com | $706.00 |
| Deguns | $707.99 |
| Selwayarmory Com | $707.99 |
| Brownells | $709.99 |

*...and 2 more offers*

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