Diamondback DB15 Obsidian 5.56 NATO 11.5 in Pistol

About this product

The Diamondback DB15 Obsidian is a compact AR-style pistol built for utility and controllability in a short-barrel configuration. Chambered for 5.56 NATO, it pairs an 11.50-inch 4150 Chrome-Moly Vanadium barrel with a carbine-length direct-impingement gas system to maintain reliable cycling in a compact package. The 11-inch M-LOK anti-rotation handguard provides modular attachment options while the SB Tactical SBA5 pistol brace supports improved handling. Standard Mil-Spec components and a Magpul Gen M3 PMAG round out a pragmatic feature set for duty, range, or general-purpose use.

Key Specifications

• The caliber is 5.56 NATO (.223 Rem compatible).
• The barrel measures 11.50 inches and is made from 4150 Chrome-Moly Vanadium steel.
• The barrel finish is Black Nitride for corrosion resistance and durability.
• The gas system is a carbine-length direct impingement design for conventional AR cycling.
• The bolt carrier group is a Mil-Spec 8620, shot-peened and magnetic-particle inspected unit.
• The handguard is an 11-inch M-LOK Anti-Rotation V4 S-Rail with full Picatinny and QD mounts.
• The pistol uses an SB Tactical SBA5 pistol brace for support and control.
• The muzzle device is a DB Obsidian muzzle brake (1/2×28).
• The receiver components are forged 7075 T-6 aluminum.
• The standard magazine included is a Magpul Gen M3 PMAG, 30-round.

With practical features and service-grade components, the DB15 Obsidian delivers a balanced, compact AR pistol package for shooters who prioritize modularity and predictable performance. Its combination of an 11.5-inch nitride-treated barrel, M-LOK attachment options, and an SBA5 brace make it well suited for range work, close-quarters practice, and any application where a short, maneuverable AR platform is preferred.

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