The Diamondback Firearms DB15 Obsidian Series is a 5.56 NATO semi-automatic rifle built around forged 7075-T6 aluminum receivers and a mid-length direct-impingement gas system. Its 16-inch 4150 CrMoV barrel uses a 1:8 right-hand twist and combines black nitride protection with FDE Cerakote. A 15-inch M-LOK handguard provides flexible accessory mounting, while the flattop upper receiver supports a wide range of optics. The rifle includes a Magpul CTR collapsible stock, Magpul MOE K2 grip, DB Obsidian muzzle brake, and one 30-round PMAG.

Key features

• 16-inch 4150 CrMoV barrel with a 1:8 right-hand twist for versatile 5.56 NATO performance
• Mid-length direct-impingement gas system for balanced handling and cycling characteristics
• 15-inch M-LOK handguard with full Picatinny rail and integrated QD mounting points
• Flattop upper receiver provides an optic-ready mounting platform
• Magpul CTR collapsible stock and MOE K2 grip improve fit and control
• Includes one Magpul Gen M3 PMAG with 30-round capacity

The DB15 Obsidian Series combines a practical carbine layout with durable Cerakote finishes and adaptable mounting space for range, training, and general-purpose use.