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Diamondback Firearms DB15 Carbon Series California Compliant 5.56 NATO Black Rifle

The Diamondback Firearms DB15 Carbon Series is a California-compliant semi-automatic rifle chambered in 5.56 NATO and compatible with .223 Remington ammunition. It features a 16-inch threaded barrel, a 15-inch M-LOK handguard, a forged mil-spec receiver set, and a Magpul MOE carbine stock. The flat-top receiver provides a practical foundation for adding an optic, while the M-LOK handguard supports accessory installation. This configuration includes a 10-round magazine and a magazine-locking system for California compliance.

Key features

  • 16-inch threaded barrel supports standard muzzle accessories and includes an A2-style birdcage flash hider
  • 15-inch M-LOK handguard provides flexible accessory mounting with extended hand coverage
  • 5.56 NATO chambering also accepts .223 Remington ammunition
  • Magpul MOE carbine stock offers adjustable length of pull for individual fit
  • Forged mil-spec receiver set provides a proven AR-pattern foundation
  • California-compliant configuration includes a 10-round magazine and magazine-locking system

The DB15 Carbon Series combines practical AR-pattern features with a California-compliant configuration for range use and recreational shooting.

Diamondback Firearms DB15 Carbon Series California: quick facts

What caliber is the Diamondback Firearms DB15 Carbon Series California?
It is chambered in 5.56 NATO, .223 Remington.
How many rounds does it hold?
10+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: Black.
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 $707.39. Orders leave within 1-2 business days; shipping is free over $999.

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