Diamondback DB15 Obsidian DB1984K001 | 5.56 NATO

The Diamondback DB15 Obsidian is a compact AR-style pistol chambered in 5.56 NATO with an 11.5-inch threaded barrel and an 11-inch M-LOK anti-rotation handguard. It ships with an SB Tactical SBA5 pistol brace, a Magpul Gen M3 30-round PMAG, and a DB Obsidian muzzle brake threaded 1/2×28. For a versatile optic that keeps points of aim inside practical engagement distances, the Vortex Strike Eagle 1-6×24 pairs well with this platform and stays well under typical price caps for upper-tier optics.

Well-suited to range training and carbine competition, the DB15 Obsidian combines compact handling with AR ergonomics and common accessory compatibility.

Product Specifications

• The model is DB15 Obsidian (DB1984K001).
• The caliber is 5.56 NATO.
• The barrel measures 11.5 inches and is manufactured from 4150 Chrome-Moly Vanadium with a black nitride finish.
• The barrel uses a 1:8 right-hand rate of twist.
• The gas system is a carbine-length direct impingement system.
• The handguard is an 11 inch M-LOK Anti-Rotation V4 S-Rail with full Picatinny and QD mounts.
• The firearm ships with an SB Tactical SBA5 pistol brace.
• The upper and lower receivers are forged 7075 T-6 aluminum.
• The bolt carrier group is a shot-peened, magnetic-particle inspected Mil-Spec 8620 carrier.
• The muzzle device is a DB Obsidian Muzzle Brake threaded 1/2 x 28.
• The package includes a Magpul Gen M3 30-round PMAG.
• The trigger is a standard Mil-Spec trigger.
• No iron sights are included; the firearm ships with none installed.
• The finish is a black hardcoat anodize.
• The UPC is 810035756236.

The DB15 Obsidian delivers compact maneuverability with familiar AR controls and accessory compatibility. Its threaded 11.5-inch nitride-treated barrel and 11-inch M-LOK rail make it easy to configure for short-barrel loadouts while retaining the parts commonality many shooters prefer. Whether building a lightweight range setup or a competition-ready carbine platform, this build offers a straightforward baseline for upgrades and optics.

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