Diamondback DB15 Obsidian | .300 AAC Blackout | DB1984B101

The Diamondback DB15 Obsidian is an AR-style pistol chambered in .300 AAC Blackout with a compact configuration intended for close-quarters and suppressed shooting. It pairs an SBA5 pistol brace with a Magpul MOE K2 grip and a M-LOK anti-rotation rail for modular accessory mounting. For a matching optic under $1,000, a compact red dot such as a Holosun 510C provides a low-profile, fast-acquisition sighting solution well suited to this platform.

Applications: short-range precision with suppressed or subsonic loads; dynamic range and training drills where compact handling and rapid target acquisition are priorities.

Product Specifications

• The manufacturer is Diamondback Firearms.
• The model is DB15 (Obsidian).
• The caliber is .300 AAC Blackout.
• The action is Semi-Auto.
• The capacity is 30 + 1.
• The barrel length is reported as not consistent across source listings and requires verification.
• The muzzle device is an Obsidian Muzzle Brake (5/8 x 24).
• The handguard is a 9-inch M-LOK Anti-Rotation V4 S-Rail with full Picatinny and QD mounts.
• The pistol uses an SB Tactical SBA5 Brace.
• The grip is a Magpul MOE K2 (black).
• The receiver is forged 7075 T-6 aluminum.
• The finish/color is listed as Olive Drab Green with applied finish/anodized.
• The weight is 6.25 lbs.
• The overall length is 26.75″ to 29.50″ (collapsed/extended).
• The package includes one 30‑round Magpul Gen M3 PMAG.
• The UPC is 810035756717.

The DB15 Obsidian brings an intentionally compact AR-pistol layout with familiar ergonomics and modern accessory compatibility. Its modular M-LOK handguard and included SBA5 brace make it a practical choice for shooters who need a short, maneuverable platform for close-range work and suppressed setups. The included Magpul PMAG and robust forged receivers emphasize durability and field serviceability.

Related Videos: