Diamondback DB15 Obsidian 5.56 NATO 16 in FDE AR Rifle

About this product

The Diamondback DB15 Obsidian is an AR-style semi-automatic rifle built on forged 7075-T6 aluminum receivers and finished in Flat Dark Earth Cerakote. It is chambered for .223 Rem / 5.56 NATO and fitted with a 16 inch medium-profile Diamondback barrel with a 1:8 right-hand twist and a mid-length gas system. The platform features ambidextrous controls, a 15 inch anti-rotation M-LOK handguard, Magpul furniture and ships with a single 30-round Magpul Gen M3 PMAG. At roughly 6.6 pounds it provides a balanced, adaptable modern sporting rifle configuration suitable for range use and modular upgrades.

Key Specifications

• The caliber is .223 REM/5.56 NATO.
• The barrel is a 16 inch, 1:8 RH, 4150 CrMoV medium-profile with a black nitride finish.
• The gas system is a mid-length configuration for smoother operation.
• The bolt carrier group is a shot-peened, magnetic-particle inspected Mil-Spec 8620 carrier.
• The receivers are forged 7075 T-6 aluminum.
• 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.
• The magazine capacity is 30 + 1 and it includes a Magpul Gen M3 PMAG.
• The muzzle device is a DB Obsidian Muzzle Brake (1/2 x 28).
• The unloaded weight is approximately 6.6 lbs.

Built with common, serviceable components and a user-focused feature set, the DB15 Obsidian is a practical platform for shooters who value a durable finish, ambidextrous controls and straightforward upgrade paths. Its modular M-LOK handguard and forged receiver set make it well-suited for mounting optics and accessories, while the Magpul furniture provides familiar ergonomics. The combination of a mid-length gas system and a 16 inch nitride-treated barrel gives a balanced handling characteristic for a variety of range and training applications.

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