The Diamondback Firearms Carbon DB15 is a semi-automatic rifle chambered in 300 AAC Blackout with an olive drab green finish. The forged 7075 T6 aluminum receiver keeps weight at 6.6 lbs. while the 15-inch M-Lok rail and threaded barrel make it adaptable for different setups. 
 

Key Specifications 

• Manufacturer: Diamondback Firearms 
• Family: Carbon Series 
• Model: Carbon DB15 Rifle 
• Type: Rifle 
• Action: Semi-Auto 
• Caliber/Gauge: 300 AAC Blackout 
• Finish: Olive Drab Green (Applied Finish) 
• Stock: Collapsible / Folding Stock (Magpul MOE Carbine Stock) 
• Barrel Length: 16" 
• Overall Length: Adjustable from 32" to 36" 
• Rate-of-Twist: 1-in-8 
• Capacity: 30 + 1 rounds (includes one 30 rd. PMAG) 
• Weight: 6.6 lbs. 
• Safety Features: Two-Position Thumb Safety 
• Receiver Material: Forged 7075 T6 Aluminum 
• Additional Info: 
  • M-Lok Rail (15") 
  • A2 Flash Hider  
  • Magpul MOE Grip  
  • Thread Pattern: 5/8x24 
     

Detailed Features 

 
The Magpul MOE Carbine Stock adjusts overall length from 32 to 36 inches, accommodating different shooter builds and making the rifle more compact for storage or transport. The 5/8x24 threaded barrel accepts suppressors or other muzzle devices, relevant for 300 BLK, where suppressed shooting is common. 
 
The 15-inch M-Lok rail covers most of the handguard, giving room for lights, lasers, or other accessories without a clutter of adapters. Magpul MOE grip and stock keep the control surfaces consistent and familiar for anyone used to the AR platform. 
 

Target Audience 

 
Suited to hunters, competitive shooters, and home defense users who want 300 AAC Blackout in a standard AR format with suppressor-ready hardware from the factory. 
 

Usage Scenarios 

 
The 300 BLK chambering handles both supersonic and subsonic loads well, making this rifle a practical choice for suppressed use. The collapsible stock and 6.6 lb. weight keep it manageable in tight spaces or over a long day in the field.

The Diamondback Carbon DB15 in 300 AAC Blackout with olive drab green finish gets a generally balanced reception among owners.

The lightweight construction comes up most often as an advantage, easy to carry during extended use. The olive drab finish is popular with users who want something other than standard black; it's a common reason people choose this model over similar AR-platform rifles.

Accuracy and reliability with quality 300 BLK ammunition are broadly positive. Users note good feeding from the included PMAG and acceptable accuracy for the platform. Customization options draw praise as well. The M-Lok rail and standard AR components mean aftermarket upgrades are straightforward.

On the critical side, some owners question long-term durability compared to traditional aluminum receivers. There are also scattered reports of minor malfunctions or quality control issues on initial inspection. Customer service experiences vary by user. Overall, most owners are satisfied with the value they get at the price point, though some note they went in with realistic expectations.