Diamondback Firearms AR 9mm Pistol!

Published on October 14, 2022
Duration: 10:56

This review of the Diamondback DB9 AR-9mm pistol covers its specifications, features, and the reviewer's experiences. Key aspects include the non-standard buffer tube affecting brace/stock compatibility, the blowback operating system, and the 4-inch barrel with a 6-inch rail. While generally accurate and fun to shoot, a minor issue with the bolt hold mechanism was encountered and resolved.

Quick Summary

The Diamondback DB9 AR-9mm pistol features a blowback operating system and a 4-inch barrel with a 1:10 twist rate. It comes with a 6-inch M-LOK rail, Magpul K2 grip, and 31-round ProMag magazines. Note that its non-standard buffer tube may require modification for aftermarket stock or brace installation.

Chapters

  1. 00:00Introduction & Transparency
  2. 00:26Diamondback DB9 Overview
  3. 01:52DB9 Specifications & MSRP
  4. 02:14Midnight Bronze Cerakote
  5. 02:35Pistol Brace & Buffer Tube Issues
  6. 03:35Magpul K2 Grip & Mil-Spec Trigger
  7. 03:55Blowback System & Bolt Hold
  8. 04:17ProMag Magazine Performance
  9. 05:04Barrel, Twist Rate & Rail System
  10. 05:25QD Sling Points & Rail Limitations
  11. 06:11CAC Flash Can
  12. 06:26Barrel Length & Rail Comparison
  13. 06:40Shooting Experience & Initial Issues
  14. 07:04Bolt Hold Mechanism Failure
  15. 07:49Troubleshooting & Resolution
  16. 08:04Post-Fix Performance & Accuracy
  17. 08:16Ammunition Shoutouts
  18. 08:53Why Buy The DB9?
  19. 09:19Real-World Applications
  20. 09:33Accessory Limitations (Lights)
  21. 09:51Personal Defense Weapon Use
  22. 09:57Hunting & General Fun Use
  23. 10:17Conclusion & Recommendations
  24. 10:33Discount Code & Links

Frequently Asked Questions

What is the operating system of the Diamondback DB9 AR-9mm pistol?

The Diamondback DB9 AR-9mm pistol operates using a blowback system. This is a common and effective method for 9mm AR-style firearms, providing reliable cycling of the action.

Can I easily install a standard AR-15 stock on the Diamondback DB9?

No, the Diamondback DB9 features a non-standard buffer tube. If you wish to install a standard AR-15 stock or brace, you will likely need to replace the entire buffer system.

What are the key specifications of the Diamondback DB9?

The Diamondback DB9 has a 4-inch barrel with a 1:10 twist rate, a 6-inch M-LOK rail with QD points, a Magpul K2 grip, and a CAC flash can. It MSRPs for $1174.

What kind of magazines does the Diamondback DB9 use?

The Diamondback DB9 comes with 31-round ProMag magazines. These were found to feed reliably during testing, despite some users' reservations about the ProMag brand.

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