Item #:
810035754140
UPC: #:
810035754140
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Diamondback DB15 300 Blackout 16" Rifle w/ M-LOK Handguard

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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
The 300 Blackout cartridge excels in close-quarters scenarios while maintaining effectiveness at intermediate ranges up to 200 yards. Suppressor-ready design accommodates both subsonic loads for quiet operation and supersonic ammunition for maximum terminal performance. The heavy barrel profile maintains accuracy during extended shooting sessions while the nitride treatment extends barrel life significantly over chrome-lined alternatives.

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
This configuration addresses the growing demand for a versatile platform capable of handling diverse ammunition types without modification. The factory Magpul components and extended handguard justify the investment for shooters seeking immediate operational capability.