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Diamondback Firearms DB15 Obsidian 5.56 NATO Black Rifle

The Diamondback Firearms DB15 Obsidian is a semi-automatic rifle chambered for 5.56 NATO and .223 Remington. It combines forged 7075-T6 aluminum receivers with a 4150 chrome moly barrel, a mid-length direct-impingement gas system, and a shot-peened Mil-Spec 8620 bolt carrier group. A 15-inch M-Lok handguard provides flexible accessory mounting, while the A3 flattop receiver and full-length Picatinny rail support a wide range of optics. The Magpul MOE-K2 grip and Magpul CTR stock provide a comfortable, adjustable fit for range use, training, and general-purpose applications.

Key features

  • Chambered for 5.56 NATO and .223 Remington
  • 16-inch 4150 chrome moly barrel with a 1:8 twist rate
  • Mid-length direct-impingement gas system for balanced cycling
  • Forged 7075-T6 aluminum receivers for strength and reduced weight
  • 15-inch M-Lok handguard with anti-rotation features and full-length Picatinny rail
  • A3 flattop receiver is ready for optic installation with compatible mounts

The DB15 Obsidian delivers a versatile, configurable rifle platform with proven AR-style controls and accessory compatibility.

Diamondback Firearms DB15 Obsidian 5.56 NATO Black Rifle: quick facts

What caliber is the Diamondback Firearms DB15 Obsidian 5.56 NATO Black Rifle?
It is chambered in 5.56 NATO, .223 Remington.
How many rounds does it hold?
30+1 rounds; magazines included: 1.
How big and heavy is it?
Barrel length 16 inches, overall length 36.25 inches, weight 6.6 pounds.
What kind of action does it use?
Semi-Automatic.
Is it optic ready or threaded?
Optic ready: Yes; threaded barrel: Yes.
What sights and finish does it have?
finish: Black.
Is it new or used?
New, in the original packaging.
Can I buy it in Idaho?
Yes. It ships to a licensed FFL dealer in Idaho; you pick it up there after the background check. Idaho buyers pick this up at a licensed dealer after a NICS check, with no permit and no waiting period; dealers sell rifles and shotguns from age 18.
Is it in stock?
Yes, at $1012.56. Orders leave within 1-2 business days; shipping is free over $999.

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