The Diamondback DB1731B001 DB15 delivers reliable performance in the versatile 300 Blackout platform with a 16-inch nitride-treated heavy barrel optimized for both subsonic and supersonic ammunition. This rifle combines proven AR-15 ergonomics with enhanced features for tactical applications and hunting scenarios.
What Makes This Different
The nitride-treated heavy barrel profile provides superior heat dissipation and corrosion resistance compared to standard phosphate finishes. The 15-inch M-LOK handguard extends nearly to the muzzle, maximizing accessory mounting options while maintaining a balanced weight distribution. Factory integration of Magpul furniture eliminates the need for immediate upgrades.Key Features
- 16-inch nitride-treated heavy barrel with 1:7 twist rate for stabilizing heavy subsonic projectiles
- DBSB-IV flash hider reduces muzzle signature and directs gases away from the shooter
- 15-inch M-LOK handguard with full-length top rail for optics and accessories
- Magpul CTR collapsible stock with friction lock and QD sling attachment point
- Magpul K2 pistol grip with steeper angle for improved trigger control
- A3 flattop upper receiver with M4 feed ramps for enhanced reliability
- 30-round magazine capacity with standard PMAG compatibility
Technical Specs
- Caliber: 300 AAC Blackout
- Barrel Length: 16 inches, heavy profile
- Twist Rate: 1:7 inches
- Overall Length: 32.75-36.75 inches (stock collapsed/extended)
- Weight: Approximately 6.8 pounds
- Handguard: 15-inch M-LOK compatible
- Stock: Magpul CTR with commercial buffer tube
- Grip: Magpul K2 in black
- Muzzle Device: DBSB-IV flash hider (1/2x28 TPI)
- Magazine Capacity: 30 rounds
- Finish: Black Gold anodized lower, black upper

