Diamondback DB15 Obsidian | 5.56 NATO | 11.5″ | DB1984K061

The Diamondback DB15 Obsidian is a compact AR-style pistol configured around an 11.50″ 4150 chrome-moly-vanadium barrel with a black-nitride finish and an 11″ M-LOK anti-rotation handguard. The build pairs forged 7075 T-6 aluminum receivers with a Magpul MOE K2 grip and an SB Tactical SBA5 brace in Flat Dark Earth; a 30-round Magpul Gen M3 PMAG is included. For a practical optic under $1000 that complements the DB15 Obsidian, consider a Trijicon MRO for a durable, low-profile red-dot setup that preserves fast target acquisition on a short-barrel platform.

Appropriate uses for this configuration include precision-focused range training and competition-style carbine matches where compact handling and accessory flexibility matter.

Product Specifications

• The manufacturer is Diamondback Firearms.
• The model and part number are DB15 Obsidian (DB1984K061).
• The caliber is 5.56 NATO.
• The barrel measures 11.50 inches.
• The barrel material is 4150 Chrome-Moly Vanadium.
• The barrel finish is Black Nitride.
• The rate of twist is 1:8 RH.
• The handguard is an 11 inch M-LOK Anti-Rotation V4 S-Rail with full Picatinny and QD mounts.
• The brace is an SB Tactical SBA5 brace in FDE.
• The included magazine is a Magpul Gen M3 PMAG 30‑round.
• The muzzle device is a DB Obsidian Muzzle Brake (1/2 x 28).
• The gas system is carbine-length direct impingement.
• The receivers are forged 7075 T-6 aluminum.
• The weight is 6.25 lbs.
• The UPC is 810035756243.

This DB15 Obsidian combines compact handling and accessory-ready ergonomics for users who need a short-barrel platform with modern furniture and a high-capacity magazine included. The package is geared toward shooters who prioritize modularity and straightforward serviceability while operating inside the practical limits of a short-barrel AR configuration.

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