Diamondback DB15 Obsidian 5.56 NATO 11.5in FDE SBA5

The Diamondback DB15 Obsidian is a compact AR-style semi-auto pistol designed for short-barrel performance and modular accessory mounting. It is chambered for .223 Rem/5.56 NATO and features an 11.50-inch 4150 Chrome-Moly Vanadium barrel with a Black Nitride finish. The package pairs an 11-inch M-LOK anti-rotation V4 S-rail with SB Tactical SBA5 arm brace hardware and a Magpul MOE K2 grip.

Key Specifications

• The caliber is .223 Rem/5.56 NATO.
• The barrel length is 11.50 inches.
• The barrel material is 4150 Chrome-Moly Vanadium with a Black Nitride finish.
• The gas system is carbine-length direct impingement.
• The handguard is an 11 inch M-LOK Anti-Rotation V4 S-Rail with full Picatinny and QD mounts.
• The arm support is an SB Tactical SBA5 brace (FDE).
• The included magazine capacity is 30 + 1 rounds (one Magpul Gen M3 PMAG)
• The weight is approximately 6.25 lbs.
• The exterior finish is FDE Cerakote.
• The bolt carrier group is a shot-peened, magnetic particle inspected Mil-Spec 8620 carrier.

The DB15 Obsidian pairs short-barrel maneuverability with a robust parts set and an M-LOK platform for straightforward accessory integration. With nitride-treated barrel surfaces, a proven BCG, and an included 30-round PMAG, this configuration provides a practical foundation for range use and customization while retaining a familiar AR control layout.