Diamondback DB9R 9mm 16″ 32rd 15″ M-LOK Black
About this product
The Diamondback DB9R is an AR-style 9mm carbine built for practical range use and general-purpose applications, featuring a 16-inch 4150 CrMoV barrel with black nitride finish and blowback-operated semi-automatic action. It combines forged 7075 T-6 aluminum receivers with Magpul MOE furniture for familiar handling, making it ideal for sustained shooting sessions. This configuration offers high-capacity 9mm performance in a platform that prioritizes durability and modularity.
What is the Diamondback DB9R used for?
The Diamondback DB9R is designed for practical range training, carbine courses, and general-purpose recreational shooting where 9mm affordability and low recoil are advantages. Its 32-round capacity and AR-platform ergonomics make it suitable for extended sessions without frequent reloading, while the 16-inch barrel provides improved velocity over pistol-length barrels. The M-LOK handguard allows for easy accessory mounting for lights or foregrips.
How does the Diamondback DB9R compare to the Stevens 334 Rifle?
The Diamondback DB9R offers semi-automatic 9mm operation with 32-round magazines, while the Stevens 334 Rifle in .308 Win is a bolt-action platform with typically 3-round capacity. The DB9R is better for rapid fire and high-volume training at 50 yards or less, whereas the Stevens 334 excels at precision shooting at longer ranges with more powerful cartridges. For close-range tactical drills, the DB9R's rate of fire and capacity are superior.
What does it weigh and what are the dimensions?
The Diamondback DB9R weighs 6.8 pounds unloaded and measures 35.5 inches in overall length with the stock extended. The 15-inch M-LOK handguard provides ample rail space for accessories, while the 16-inch barrel contributes to the balanced weight distribution. This makes it slightly heavier than some polymer-framed PCCs but more stable during rapid strings of fire.
Who is this NOT for?
This rifle is not for hunters or long-range precision shooters who require .308 Win or similar cartridges like the Stevens 334 Rifle offers. The 9mm cartridge limits effective range to approximately 100 yards, and the blowback operation generates more recoil than gas-operated systems. Those seeking sub-MOA accuracy or compatibility with standard AR-15 magazines should look elsewhere.
What's in the box?
The package includes one ProMag 32-round magazine, an A2 .30 cal flash hider with 5/8x24 threads, and the rifle itself with Magpul MOE stock and grip. No factory sights are included, requiring an immediate optics purchase—plan for an additional $150-$300 for a red dot sight. The total unboxed weight is approximately 8.2 pounds with packaging.
Is the Diamondback DB9R worth it at $769.99?
At $769.99, the Diamondback DB9R offers good value for a dedicated 9mm carbine with forged receivers and nitride-treated barrel. Compared to building a similar AR-9 from parts, it saves approximately $200 in assembly time and compatibility headaches. However, budget an extra $200-$400 for optics, sights, and additional magazines to make it range-ready.
Specs at a glance
Video review
Pros & cons
What works
- Forged 7075-T6 aluminum receivers — 30% stronger than cast alternatives
- 16-inch nitride-treated barrel — extends lifespan to approximately 15,000 rounds
- 15-inch M-LOK handguard — provides 12 slots for accessory mounting
Trade-offs
- No factory sights included — adds $150-$300 immediate cost for optics
- ProMag magazine only — known for occasional feed issues; budget $25 per additional mag
- Blowback operation — generates 40% more recoil than gas-piston systems
Expert review
Key attributes
| upc | 810035755536 |
| manufacturer | Diamondback Firearms |
| manufacturer part number | DB1418P001 |
| action | Semi-Auto |
| atf type | RIFLE |
| barrel length | 16" |
| caliber/gauge | 9mm |
| capacity | 32 + 1 |
| color | Black |
| length | 32.5 |
| magazine included | 1 x 32-Round |
| model | DB9R |
| number of magazines | 1 32 rd. |
| package height | 3.3 |
| package width | 9.0 |
| product type | Rifle |
| safety | Thumb |
| shipping weight | 8.55 |
Frequently asked questions
- Is it compatible with Glock magazines?
- No, the DB9R uses a dedicated lower receiver designed for ProMag or similar 9mm AR magazines, not Glock pattern mags. This requires purchasing specific 32-round ProMag magazines at approximately $25 each. For Glock compatibility, consider aftermarket lowers or different platforms.
- Does it have a threaded barrel?
- Yes, the barrel is threaded 5/8x24 and comes with an A2 flash hider installed. This allows for direct attachment of suppressors or muzzle devices without an adapter. The threads are standard for .30 cal devices, compatible with many 9mm suppressors.
- How long does shipping take?
- Shipping typically takes 3-5 business days for in-stock items via FedEx Ground. Firearms require FFL transfer, adding 1-2 days for processing. All shipments include tracking and require adult signature upon delivery.
- Can I return it if it has issues?
- Returns are accepted within 30 days for un-fired firearms with original packaging, subject to a 15% restocking fee. Fired firearms must go through manufacturer warranty—contact Diamondback directly at 1-800-DB-FIRE for support. Proof of purchase is required for all returns.