Connecticut FirearmsCatalogue entry
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Diamondback Firearms DB15 Flat Top 5.56 NATO FDE/Tan Rifle

The Diamondback Firearms DB15 is a modern sporting rifle chambered in 5.56 NATO and built around a flat-top, optic-ready receiver. Its 16-inch threaded barrel balances maneuverability with practical performance, while the adjustable Magpul ACS-L stock and MOE-K2+ grip provide a secure, comfortable shooting position. The rifle features a single-stage trigger, manual safety, and 30+1 capacity for range use, training, and practical rifle applications.

Key features

  • 5.56 NATO chambering also accepts .223 Remington ammunition
  • 16-inch threaded barrel with 1/2x28 muzzle threads
  • Optic-ready flat-top receiver for flexible sighting system installation
  • Adjustable Magpul ACS-L stock supports a customized length of pull
  • Magpul MOE-K2+ grip improves control and handling comfort
  • Single-stage trigger provides a consistent trigger interface

The Diamondback DB15 combines a versatile 5.56 NATO platform with practical Magpul furniture and an optic-ready configuration.

Diamondback Firearms DB15 Flat Top 5.56 NATO FDE/Tan Rifle: quick facts

What caliber is the Diamondback Firearms DB15 Flat Top 5.56 NATO FDE/Tan Rifle?
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 37.25 inches, weight 6.65 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: FDE/Tan.
Is it new or used?
New, in the original packaging.
Can I buy it in Connecticut?
Yes. It ships to a licensed FFL dealer in Connecticut; you pick it up there after the background check. Connecticut buyers need a Long Gun Eligibility Certificate or pistol permit, and the Connecticut dealer will only transfer rifles and shotguns that are legal under the state's assault weapon law.
Is it in stock?
Yes, at $1292.59. Orders leave within 1-2 business days; shipping is free over $999.

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