The Diamondback DB15 Diamond 5.56 rifle (brand part no. DB1758K001) is the Diamond Series AR-15 in black anodize, a step above the Carbon builds. Diamondback Firearms fits a 16-inch barrel with a mid-length gas system, a DB Diamond muzzle brake and a CMC 3.5 pound drop-in trigger. A 15-inch M-LOK anti-rotation S-Rail handguard, Magpul K2+ grip and ACS-L stock complete the build, and a 30-round PMAG is included. It fits shooters who want a refined general-purpose AR for range sessions, hunting or home defense.

Key Specifications

• Chambering is 5.56 NATO, the standard AR-15 military cartridge.
• The barrel is 16 inches with a 1:8 right-hand twist, in medium-profile 4150 CrMoV with a black nitride finish.
• The finish is black anodize on forged 7075-T6 aluminum receivers.
• A DB Diamond muzzle brake threaded 1/2×28 reduces recoil and muzzle rise.
• The trigger is a CMC 3.5 pound single-stage drop-in for a clean, consistent break.
• The gas system is mid-length with a pinned gas block, which smooths cycling.
• The handguard is a 15-inch M-LOK S-Rail with anti-rotation for accessory mounting.
• The stock is a Magpul ACS-L and the grip is a Magpul K2+.
• The lower is a Diamondback Diamond lower with an enhanced skeletonized trigger guard, and one Magpul Gen 2 PMAG with 30 rounds is included.
• Weight is 6.95 pounds and length is 34 inches collapsed and 37.25 inches extended.

Frequently Asked Questions

What trigger does the Diamond Series use? A CMC 3.5 pound single-stage drop-in trigger.

Does it have a muzzle brake? Yes. It carries a DB Diamond muzzle brake threaded 1/2×28.

Does this rifle include sights? No. The sights are listed as none, so you mount your own optic or backup irons on the flat-top upper.

Buy the Diamondback DB15 Diamond Series Rifle, 5.56 NATO, 16-Inch, Black, Muzzle Brake, CMC Trigger, 30-Round

The Diamond Series pairs a CMC trigger and a muzzle brake with Magpul furniture, which is a lot of upgrades in one ready-to-shoot rifle. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and see more AR rifles before you decide.