The Diamondback DB15 Obsidian in 5.56mm (MPN DB1784K131) is a semi-automatic AR-15 rifle finished in brown, pairing a 16-inch barrel with a 1:8 twist rate for a wide range of 5.56 bullet weights. Diamondback Firearms finishes the barrel in black nitride under an FDE Cerakote coat, threads the muzzle at 1/2×28, and includes an M-Lok handguard for accessory mounting. The rifle feeds from a detachable magazine with a 30-round capacity; one 30-round PMAG ships with the rifle. No sights are installed, leaving the flat top ready for an optic. Among AR-platform rifles in the AR rifles category, the DB15 Obsidian favors shooters who want a brown-finished AR-15 for desert or dry-terrain use.

Key Specifications

• Chambered in .223 Rem/5.56 NATO with a 1:8-inch twist rate.
• Features a 16-inch barrel.
• Finished in black nitride with an FDE Cerakote coat.
• Threaded muzzle at 1/2×28.
• Includes an M-Lok handguard for accessory mounting.
• Feeds from a detachable magazine with a 30-round capacity.
• Ships with one 30-round PMAG.
• Ships with no sights installed, ready for an optic.
• Ships at approximately 8.1 pounds.

Frequently Asked Questions

What finish does this rifle use? Black nitride under an FDE Cerakote coat.

Does this rifle come with sights? No, it ships without sights, ready for an optic to be mounted.

Buy the Diamondback DB15 Obsidian 5.56mm

A brown-finished AR-15 for desert or dry-terrain use is exactly what the DB15 Obsidian delivers. As soon as it is ready to ship, order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.