Diamondback DB15 Obsidian AR Pistol 5.56 11.5in FDE

About this product

The Diamondback DB15 Obsidian is an AR-style pistol built for compact handling and dependable function on the range or in close-quarters scenarios. Chambered for 5.56 NATO, it uses a carbine-length gas system and a threaded 11.5-inch 4150 Chrome-Moly Vanadium barrel with a black nitride finish. The package pairs an 11-inch M-LOK anti-rotation handguard and SB Tactical SBA5 brace in Flat Dark Earth with Magpul ergonomics for familiar AR control. A 30-round Magpul PMAG is provided for capacity and quick reloads.

Key Specifications

• The caliber is 5.56 NATO.
• The barrel measures 11.5 inches and is 4150 Chrome-Moly Vanadium with a black nitride finish.
• The gas system is carbine-length, direct impingement for standard AR cycling.
• The bolt carrier group is shot-peened with an MPI-inspected Mil-Spec 8620 carrier.
• The upper and lower receivers are forged 7075 T-6 aluminum.
• The handguard is an 11-inch M-LOK Anti-Rotation V4 S-Rail with full Picatinny and QD mounts.
• The stock/arm support is an SB Tactical SBA5 brace in FDE.
• The firearm ships with a 30-round Magpul Gen M3 PMAG (one magazine).
• The overall weight is approximately 6.25 lb.
• The rate of twist is 1:8 inch, right-hand and the muzzle is threaded 1/2″-28 with the DB Obsidian muzzle brake installed.

Purpose-built for shooters who want compact performance and conventional AR ergonomics, the DB15 Obsidian balances short-barrel maneuverability with standard AR controls and Magpul components. Its combination of a nitride-finished 4150 barrel, an M-LOK rail, and an SBA5 brace makes it a capable option for range-oriented use and close-quarters handling where a compact platform is preferred.

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