The Diamondback DB15 Extended Line 5.56 NATO rifle in black (Diamondback part no. DB1717K002) is a traditional-looking AR with a 16-inch barrel and a 10-inch free float quad rail. A carbine-length direct impingement gas system, a 6-position mil-spec buttstock and an A2 style grip keep the controls familiar. The forged 7075-T6 aluminum receivers wear a black hard-coat anodized finish, and the upper is an A3 flat-top for mounting optics. A 30-round metal magazine is included, which makes this a straightforward choice for the range, training classes or a first AR build-out.

Key Specifications

• The chambering is 5.56 NATO, the standard AR-15 rifle cartridge.
• The barrel is 16 inches with a 1:8 right-hand twist, medium profile, 4150 CrMoV steel with a black nitride finish.
• The gas system is carbine length direct impingement, the traditional setup for a 16-inch AR.
• The handguard is a 10-inch free float quad rail, which gives mounting space on all four sides.
• The upper is a forged 7075-T6 aluminum A3 flat-top, leaving the top rail open for an optic.
• The finish is black hard-coat anodize, a durable coating that resists wear.
• The stock is a 6-position mil-spec buttstock, which adjusts for length of pull.
• A 30-round metal magazine is included with the rifle.
• The muzzle device is an A2 flash hider threaded 1/2×28.
• Weight is 6.4 pounds, a light carbine-class package.

Frequently Asked Questions

What kind of handguard does the Extended Line DB15 have? It has a 10-inch free float quad rail, which gives you mounting surface on all four sides for lights, grips and accessories.

What comes with the rifle? A 30-round metal magazine comes with it. Diamondback lists the sights as none, so you add the optic or backup sights you prefer.

What is the muzzle thread? The A2 flash hider threads on at 1/2×28, a standard AR-15 5.56 pattern.

Buy the Diamondback DB15 Extended Line 5.56 NATO in Black

A free float quad rail and a mil-spec stock give this DB15 the layout that most AR shooters know without a learning curve. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL, and see more AR rifles while you are here.