Diamondback DB15 DB1784K131 | 5.56 | 16in

The Diamondback DB15 Obsidian is a U.S.-made AR-platform rifle chambered in 5.56 NATO built around a mid-length direct impingement gas system. It features a 16-inch 4150 Chrome-Moly-Vanadium barrel finished in black nitride with FDE Cerakote and a 15-inch M-LOK anti-rotation V4 S-rail for accessory mounting. Controls include ambidextrous safety and front QD sling mounting, and the rifle ships with a Magpul Gen M3 30-round PMAG and Magpul furniture in FDE.

For an optic that complements this platform and stays well under $1,000, consider the Vortex Strike Eagle 1-8×24 as a versatile choice for both close and mid-range work. Typical uses for this configuration include precision rifle training at the range and competition shooting where a durable, mid-length AR with ample accessory options is required.

Product Specifications

• The UPC is 810035756199.
• Chambering is 5.56 NATO.
• The barrel measures 16 inches and is made from 4150 Chrome Moly Vanadium with a black nitride finish and FDE Cerakote.
• The rifling twist rate is 1:8.
• The gas system is a mid-length direct impingement system.
• The action type is Semi-Auto.
• The bolt carrier group is a shot-peened, magnetic particle inspected Mil-Spec 8620 carrier.
• The upper is an A3 flattop forged 7075 T-6 aluminum and is T-marked.
• The lower is forged 7075 T-6 aluminum with a Magpul enhanced trigger guard.
• The handguard is a 15-inch M-LOK Anti-Rotation V4 S-Rail with full Picatinny and QD mounts.
• The stock is a Magpul CTR and the grip is a Magpul MOE-K2 in FDE.
• Includes one Magpul Gen M3 PMAG 30‑round magazine.
• The muzzle device is a DB Obsidian muzzle brake threaded 1/2×28.
• The trigger is standard Mil-Spec.

Built from forgings and machined components, the DB15 Obsidian combines proven AR geometry with modern accessory compatibility for a practical, field-ready package. The long M-LOK rail and Magpul furniture make it straightforward to tailor ergonomics and controls to the shooter, while the mid-length gas system and quality BCG configuration aim to deliver consistent operation and manageable recoil impulse. This configuration is well suited to shooters who want a reliable, customizable AR platform for training and competitive rifle applications.

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