Description
Engineered for precision and durability, the Diamondback DB15 chambered in 300 AAC Blackout delivers consistent performance across various shooting applications. This rifle combines robust construction with thoughtful design elements that appeal to both experienced shooters and those building their first AR-15.
The DB15 features a direct impingement gas system that ensures reliable cycling with minimal maintenance requirements. Its 4150 chrome-moly vanadium steel barrel provides excellent heat resistance and longevity, while the 1:8 twist rate optimizes bullet stabilization for enhanced accuracy. The rifle’s mil-spec components ensure compatibility with a wide range of aftermarket accessories, allowing for customization to meet individual preferences.
- Caliber: 300 AAC Blackout
- Action: Semi Auto
- Capacity: 30 Rounds
- Barrel Length: 16″
- Weight: 8.7 lbs
California firearm enthusiasts appreciate the DB15’s compliance features, which include a fixed magazine configuration that meets state regulations while maintaining the rifle’s functional capabilities. The 300 AAC Blackout cartridge offers excellent performance in both supersonic and subsonic configurations, making this rifle suitable for target shooting, hunting, and defensive applications where reduced noise signature may be advantageous.
This rifle ships to your preferred California FFL dealer for transfer, with availability for customers throughout the state including Los Angeles, San Diego, and Sacramento.




Maria S. (verified owner) –
Living in Stockton, finding a properly configured AR for California laws was important. The DB15 handled well during my monthly range visits. My only issue was the price point felt a bit high compared to similar models. The accuracy with 62-grain ammo was consistently good at 50 yards.
Jessica T. –
Took it to the range last weekend and was impressed with the .223 accuracy. The trigger pull felt a bit heavier than I expected, which is my only nitpick. Otherwise, it functioned flawlessly through 200 rounds.
Daniel C. –
Tested this at the Modesto shooting range over three sessions. The rifle cycled perfectly with both brass and steel case .223. I particularly liked the ergonomics of the California-compliant stock. After zeroing the sights, I was hitting consistent groups at 75 yards. The build felt sturdy and reliable throughout.
Miguel A. (verified owner) –
Picked this up at Cal Guns Depot after researching California-compliant ARs. The featureless grip felt surprisingly comfortable during my first range session, and the accuracy at 100 yards was spot-on with Federal ammo. I appreciated how easy it was to handle compared to other compliant rifles I’ve tried.
Robert M. (verified owner) –
After comparing several options, I went with the DB15 from Cal Guns Depot. The fit and finish exceeded my expectations, especially the upper and lower receiver fit. Ran 150 rounds of various 5.56 ammo without a single malfunction. The weight distribution made it comfortable to shoot all afternoon.