Diamondback Firearms Db15 Obsdn 6mm ARC 18" 26-Round Rifle

The Diamondback Firearms DB15 Obsidian 6mm ARC 18" 26-Round Rifle represents a purpose-built platform for modern tactical shooters and precision rifle enthusiasts who demand versatility without compromise. Chambered in 6mm ARC—a cartridge engineered for superior ballistic coefficient and extended-range performance—this rifle bridges the gap between intermediate and long-range capabilities in a compact, maneuverable package. The 18-inch barrel provides optimal velocity while maintaining portability for vehicle-mounted, CQB-adjacent, and dynamic entry scenarios where a full-length AR platform becomes cumbersome.

Diamondback Firearms engineered this rifle on their proven DB15 platform, delivering milspec functionality with consistent reliability in high-round-count applications. The 26-round magazine capacity maximizes engagement duration and reduces reload frequency during tactical or competitive shooting, while the Obsidian finish—a durable, corrosion-resistant coating—protects against environmental degradation in harsh field conditions. The 18-inch barrel length optimizes the ballistic performance of 6mm ARC ammunition, which benefits from sufficient velocity to achieve superior energy retention at extended distances while maintaining controllability in rapid-fire sequences.

Law enforcement tactical teams, military designated marksmen, and civilian precision shooters will find this rifle ideal for mid-range target engagement, precision hunting, and training environments where 6mm ARC's ballistic advantage becomes evident beyond 400 yards. The compact profile accommodates standard AR-15 accessories and mounting systems, allowing integration of optics, lights, and support gear without proprietary adapters. This rifle ships as an FFL-regulated firearm and requires proper licensing and background verification upon purchase in accordance with federal and state regulations.