The Diamondback Firearms DB15 Obsidian is a semi-automatic rifle chambered for 5.56 NATO and .223 Remington. It combines forged 7075-T6 aluminum receivers with a 4150 chrome moly barrel, a mid-length direct-impingement gas system, and a shot-peened Mil-Spec 8620 bolt carrier group. A 15-inch M-Lok handguard provides flexible accessory mounting, while the A3 flattop receiver and full-length Picatinny rail support a wide range of optics. The Magpul MOE-K2 grip and Magpul CTR stock provide a comfortable, adjustable fit for range use, training, and general-purpose applications.

Key features

• Chambered for 5.56 NATO and .223 Remington
• 16-inch 4150 chrome moly barrel with a 1:8 twist rate
• Mid-length direct-impingement gas system for balanced cycling
• Forged 7075-T6 aluminum receivers for strength and reduced weight
• 15-inch M-Lok handguard with anti-rotation features and full-length Picatinny rail
• A3 flattop receiver is ready for optic installation with compatible mounts

The DB15 Obsidian delivers a versatile, configurable rifle platform with proven AR-style controls and accessory compatibility.