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Diamondback Firearms DB15 M-Lok 5.56 NATO Flat Dark Earth Rifle

The Diamondback Firearms DB15 is a 5.56 NATO semi-automatic rifle designed around a versatile AR-15 pattern platform. It features a 16-inch threaded barrel, a 15-inch M-Lok anti-rotation handguard, an Obsidian muzzle brake, and an ambidextrous safety. The Magpul CTR stock and K2 grip provide a comfortable, configurable shooting position, while the flat-top receiver offers a practical foundation for adding an optic. The rifle accepts both 5.56 NATO and .223 Remington ammunition and includes a 30-round magazine.

Key features

  • 16-inch threaded barrel supports common muzzle accessories and includes an Obsidian muzzle brake
  • 15-inch M-Lok anti-rotation handguard provides flexible accessory mounting with reduced handguard movement
  • Magpul CTR adjustable stock helps accommodate different shooters and shooting positions
  • Magpul K2 grip offers a more vertical, ergonomic grip angle
  • Ambidextrous manual safety supports convenient operation from either side
  • Flat-top receiver with Picatinny rail is optic ready for a user-selected sighting system

The Diamondback DB15 combines practical controls, adaptable furniture, and accessory-ready features in a capable 5.56 NATO rifle.

Diamondback Firearms DB15 M-Lok 5.56 NATO Flat Dark Earth: quick facts

What caliber is the Diamondback Firearms DB15 M-Lok 5.56 NATO Flat Dark Earth?
It is chambered in 5.56 NATO.
How many rounds does it hold?
30+1 rounds; magazines included: 1.
How big and heavy is it?
Barrel length 16 inches, overall length 32.5 inches, weight 6.5 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: Flat Dark Earth.
Is it new or used?
New, in the original packaging.
Can I buy it in Utah?
Yes. It ships to a licensed FFL dealer in Utah; you pick it up there after the background check. Rifles and shotguns ship to your chosen Utah FFL dealer for the background check and pickup, with no state waiting period.
Is it in stock?
Yes, at $1113.76. Orders leave within 1-2 business days; shipping is free over $999.

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