Diamondback Firearms DB1222C001 DB10 308 13.5" 21-Round Rifle

The Diamondback Firearms DB1222C001 DB10 .308 Winchester rifle is a modern intermediate-range platform engineered for precision shooters, designated marksmen, and tactical professionals who demand accuracy beyond 300 yards. Built on the proven AR-10 platform, this rifle bridges the gap between standard-capacity AR-15 ergonomics and the stopping power and penetration of full-power rifle cartridges. The 13.5-inch barrel delivers a compact, maneuverable profile without sacrificing velocity, making it ideal for close-quarters and mid-range engagements where rapid target transition and reduced overall length are tactical priorities.

This rifle features a 21-round magazine capacity—substantially higher than most .308 platforms—reducing reload frequency during extended engagements or training scenarios. The lightweight 9.2-pound construction maintains shooter control and reduces fatigue during prolonged use, critical for law enforcement tactical teams and military applications. The 13.5-inch barrel length minimizes muzzle blast and flash signature while maintaining the ballistic performance necessary for .308 Winchester centerfire ammunition, which retains effective energy and accuracy at distances where intermediate cartridges fail. The Diamondback DB10 utilizes standard AR-10 components, ensuring parts compatibility and user familiarity for operators trained on modern rifle platforms.

Law enforcement designated marksmen, tactical team leaders, and civilian precision shooters benefit most from this configuration, where the balance of compact handling and precision rifle capability matters in real-world scenarios. The rifle's modularity supports standard Picatinny rails for optics mounting, allowing integration with magnified optics for precision work or red-dot systems for close-range speed. Operators accustomed to AR-15 manual of arms will find immediate familiarity, reducing training overhead when transitioning to this larger-caliber platform. The 21-round magazine capacity provides significant firepower on target without the weight penalty of competing .308 systems, making sustained accuracy practical in extended operations.