# Diamondback DB9: 9mm Semi-Auto Rifle, Adjustable Stock, Optic Ready

**Brand:** Diamondback Firearms
**Category:** Pistol Caliber Carbines
**Caliber:** 9mm

## Specifications

- **Caliber:** 9mm
- **Barrel Length:** 16"
- **Capacity:** 32 rounds
- **Finish:** Black Nitride
- **Weight:** 108.8 oz
- **Overall Length:** 36"
- **UPC:** 810035755727
- **SKU:** UCEGBnTmJ

## Description

The Diamondback DB9 is a 9mm Luger semi-automatic rifle with a 16-inch Chromoly steel barrel, 7075-T6 aluminum receiver, and an adjustable Magpul CTR stock. At 6.80 lbs and with OAL adjustable between 32.75" and 36", it's a light, handy pistol-caliber carbine.

### Key Specifications
- **Model:** DB9
- **Brand:** Diamondback
- **Caliber:** 9mm Luger
- **Action:** Semi-Auto
- **Capacity:** 32+1 rounds
- **Barrel Length:** 16 inches
- **Overall Length (OAL):** Adjustable between 32.75" - 36"
- **Weight:** 6.80 lbs
- **Safety Type:** Manual Thumb Safety
- **Stock Description:** Adjustable Magpul CTR
- **Sights:** Optic Ready
- **Receiver Material:** 7075-T6 Aluminum
- **Muzzle Device:** Flash Hider
- **Twist Rate:** 1:9.50"

### Detailed Features

The Magpul CTR stock adjusts over a 3.25-inch range for length of pull and locks solidly without play at any position. The optic-ready flat top accepts any Picatinny-compatible mount. The flash hider reduces muzzle flash in low-light. Manual thumb safety is on the left side in standard AR placement. The 1:9.50" twist is optimized for standard 9mm bullet weights.

## Frequently Asked Questions

**Q: What caliber is the Diamondback DB9?**

A: The DB9 is chambered in 9mm Luger.

**Q: What is the barrel length of the Diamondback DB9?**

A: It has a 16-inch Chromoly steel barrel.

**Q: How many rounds does the Diamondback DB9 hold?**

A: It has a 32+1 capacity.

**Q: What type of firearm is the Diamondback DB9?**

A: It is a semi-automatic pistol-caliber carbine.

**Q: Is the Diamondback DB9 optic-ready?**

A: Yes, the flat-top upper is optic-ready and accepts any Picatinny-compatible mount.

**Q: What stock does the Diamondback DB9 come with?**

A: It comes with an adjustable Magpul CTR stock that adjusts over a 3.25-inch range.

**Q: Where can I buy the Diamondback DB9?**

A: Compare current vendor offers on this page.

## What Customers Say

*AI-generated insights from customer reviews*

The DB9 draws most of its positive feedback for the adjustable stock, optic-ready setup, and the 32-round magazine capacity, a combination that makes it easy to get running right out of the box. The 9mm recoil is light, which makes it accessible to a range of shooters, and the price sits below many comparable pistol-caliber carbines.

Reliability is the main concern. Some owners report feed or eject issues, often ammunition-dependent. The compact design can amplify felt recoil compared to heavier 9mm options. Aftermarket support is thinner than for established brands. Ergonomics draw some criticism around grip sizing for larger hands. None of these problems appear universal, but they come up often enough that buyers should factor them in when comparing to more established PCC platforms.

## Pricing

**2 offers available**

| Vendor | Price |
|--------|-------|
| Grabagun Com | $840.00 |
| Primaryarms Com | $840.00 |

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