The Diamondback Firearms DB15 Obsidian Series is a 5.56 NATO AR-pattern pistol built around a forged 7075-T6 aluminum receiver set. Its 11.5-inch 4150 CrMoV barrel uses a 1:8 right-hand twist and Black Nitride treatment, while the carbine-length direct-impingement system provides a familiar operating layout. The flattop A3 upper receiver and 11-inch M-LOK handguard offer flexible mounting space for an optic and accessories. A Magpul MOE K2 grip, SB Tactical SBA5 brace, Obsidian muzzle brake, and one 30-round PMAG complete the factory configuration.

Key features

• 5.56 NATO chambering with 30+1 capacity
• 11.5-inch 4150 CrMoV barrel with 1:8 right-hand twist
• Carbine-length direct-impingement operating system
• Forged 7075-T6 aluminum receivers with T-marked flattop upper
• 11-inch M-LOK handguard with full Picatinny rail and QD mounts
• SB Tactical SBA5 brace for a compact braced-pistol configuration

The Diamondback DB15 Obsidian Series combines compact AR-pistol handling with adaptable accessory mounting and practical 5.56 NATO performance.