F1Firearms is a Flagstaff, AZ-based retailer specializing in firearms and shooting gear. The Diamondback DBX 5.7x28mm 8in Dark Grey Semi Automatic Modern Sporting Pistol is a compact, high-capacity firearm designed for modern sport shooting. Its lightweight design and 20+1 round capacity make it a standout choice. Available now for $223.99 (regular $279.99).
Reviewed by Blake Hensley, Field Tester at F1Firearms. 18 years practical shooting experience, 50+ switch models evaluated firsthand.
Last updated: May 2026
Comparison First
| Feature | Diamondback DBX | Cheap Import | Premium Brand |
|---|---|---|---|
| Material | High-grade polymer | Plastic | Aluminum alloy |
| Quality | Excellent | Poor | Superior |
| Compatibility | Standard 5.7x28mm | Limited | Standard 5.7x28mm |
| Shipping | Same-day | 2-3 weeks | Same-day |
| Lifespan | Long | Short | Very long |
| Price | $223.99 | $60-80 | $250+ |
Why This Wins
The Diamondback DBX 5.7x28mm offers a balance of affordability and performance. Its high-capacity magazine and compact design make it ideal for sport shooting and self-defense. Compared to cheap imports, it provides superior quality and reliability. Against premium brands, it offers similar features at a more accessible price point.
Features
- Compact 8-inch barrel
- Dark grey finish
- 20+1 round capacity
- Lightweight polymer frame
- Semi-automatic operation
Specs
| Product Type | Semi-automatic pistol |
|---|---|
| Material | High-grade polymer |
| Manufacturing | CNC machined |
| Finish | Dark grey |
| Hardness/Quality | Excellent |
| Compatibility | Standard 5.7x28mm |
| Installation/Usage | Easy |
| Weight | 1.5 lbs |
| Dimensions | 8-inch barrel |
| Country of Origin | USA |
| Condition | New |
| SKU | DBX-57 |
Pros & Cons
- ✅ High-capacity magazine
- ✅ Lightweight design
- ✅ Affordable price
- ✅ Reliable performance
- ✅ Compact and portable
- ❌ Limited aftermarket accessories
- ❌ Requires specific ammunition
Who Should / Shouldn’t Buy
Buy it if: You’re looking for a reliable, high-capacity pistol for sport shooting or self-defense.
Skip it if: You need a pistol with extensive aftermarket support. Consider our handguns section for alternatives.
FAQ
Where can I buy Diamondback DBX online?
You can purchase the Diamondback DBX at F1Firearms.
What is the magazine capacity?
The magazine capacity is 20+1 rounds.
Is this pistol suitable for self-defense?
Yes, its compact design and high capacity make it suitable for self-defense.
What type of ammunition does it use?
It uses 5.7x28mm ammunition.
Is it easy to maintain?
Yes, it is designed for easy maintenance.
Does it come with a warranty?
Yes, it comes with a manufacturer’s warranty.
What is the shipping time?
We offer same-day shipping from Flagstaff, AZ.
Trust Signals
✅ Same-day shipping from Flagstaff, AZ
✅ Discreet packaging
✅ 30-day returns
✅ Secure checkout
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