Diamondback DB15 .223 Remington AR Rifle w/ 16" Barrel FDE

The Diamondback DB15 .223 Remington AR rifle with 16" barrel in FDE is a no-nonsense modern sporting rifle built for hunters, sport shooters, and tactical enthusiasts who want a reliable, lightweight platform without paying premium prices. This is a complete, ready-to-run rifle that balances practical ergonomics with solid build quality—the kind of gun you grab for everything from 3-gun competition to varmint hunting to home defense.

Diamondback engineered this AR around a mid-length gas system and 1:8 twist barrel, a pairing that handles both lighter varmint loads and heavier match-grade rounds. The 16" barrel keeps overall length manageable (34" collapsed, 37.25" extended with the Magpul ACS-L stock) while maintaining velocity in the .223 Remington/5.56 NATO range. A Diamondback CNC muzzle brake tames recoil and blast, and the rifle ships with a 30-round PMAG Gen 2 magazine—so you're ready to load and shoot out of the box.

The upper and lower receivers are forged from 7075 T-6 aluminum, the carrier is shot-peened and magnetic particle inspected to military specifications, and the barrel is finished in black nitride for corrosion resistance. You'll find a CMC 3.5 lb single-stage trigger for crisp breaks, a 15" M-LOK handguard with anti-rotation design, and a MOE K2+ grip for comfortable control. The A3 flattop upper gives you a clean mounting surface for optics, and the enhanced skeletonized trigger guard won't snag gloves in cold weather. At 6.95 lb, this rifle stays light enough for all-day carry but solid enough to shoot straight.

FDE (Flat Dark Earth) finish isn't just tactical aesthetic—it's practical color that breaks up outline and blends across multiple environments. Whether you're zeroing a new scope, running drills at the range, or heading afield, the DB15 delivers the essentials without compromise.

Key Features

• Complete, ready-to-shoot .223 Remington / 5.56 NATO AR rifle—comes with magazine
• 16" Diamondback mid-length barrel with 1:8 RH twist; black nitride finish resists corrosion
• Mid-length gas system for reliable cycling and reduced felt impulse
• Forged 7075 T-6 aluminum upper and lower receivers; lightweight and rigid
• Shot-peened, mil-spec carrier with magnetic particle inspection for durability
• A3 flattop upper ready for scope mounting
• 15" M-LOK handguard with anti-rotation S-Rail design for accessories and grip options
• CMC 3.5 lb single-stage trigger for clean, predictable breaks
• Magpul ACS-L collapsible stock and MOE K2+ grip for ergonomic, glove-friendly handling
• Diamondback CNC muzzle brake (1/2 x 28) reduces recoil and blast
• FDE finish for practical field use and aesthetic appeal

Specifications

Frequently Asked Questions

Is this a complete rifle ready to shoot out of the box?

Yes. The DB15 comes fully assembled and functions-tested, with a 30-round magazine included. You'll need to add an optic or sight of your choice to the A3 flattop upper (it has 1913 rail space), but ammunition and a magazine are supplied.

What is the difference between .223 Remington and 5.56 NATO?

The DB15 is chambered in .223 Remington, which is the civilian standard. It will safely fire .223 Remington ammunition. Note that while similar in appearance, .223 Remington and 5.56 NATO are distinct cartridges with different pressure specifications; always use ammunition clearly labeled for your rifle's chamber.

Can I add a suppressor or other muzzle devices to this rifle?

The Diamondback CNC muzzle brake is threaded 1/2 x 28, a standard thread pitch. You can swap it for other muzzle devices (brakes, flash hiders, or suppressors) with that same thread pattern, subject to local and federal laws.

How does the 1:8 twist rate affect ammunition choice?

A 1:8 twist rate is a versatile moderate-to-fast twist that stabilizes a wide range of .223 projectiles, from lighter varmint bullets (50–55 gr) up through heavier match and hunting rounds (70+ gr). This makes it flexible for different uses without requiring specialty ammo.