Diamondback Firearms DB1718B002 DB15 300 31-Round Rifle

The Diamondback Firearms DB15 300 Blackout rifle represents a proven platform for shooters who demand precision and reliability in intermediate-range engagements. Purpose-built around the .300 Blackout cartridge, this rifle excels in suppressed applications, close-quarters scenarios, and situations where barrier penetration matters—making it equally at home in law enforcement tactical operations, military training, or civilian defensive use. The 31-round magazine capacity provides substantial on-board ammunition reserves, reducing reload frequency during extended engagements or high-stress scenarios.

Built on a modern direct-impingement operating system, the DB15 platform delivers consistent bolt velocity and reliable feeding across the full spectrum of .300 Blackout loads, from subsonic ammunition to full-power supersonic rounds. The rifle's 8.4-pound weight strikes a practical balance between shootability and maneuverability—light enough for sustained one-handed support and tactical repositioning, yet substantial enough to manage recoil impulse and sustain accuracy during rapid-fire sequences. The compact profile at 39.5 inches overall length makes this platform ideal for entry work, vehicle-based operations, or any environment where a full-size 5.56 NATO rifle becomes unwieldy without sacrificing ballistic effectiveness.

Law enforcement tactical teams, military special operations units, and serious civilian shooters seeking a purpose-driven intermediate rifle will find the Diamondback Firearms DB15 300 Blackout a credible solution for roles where suppressed fire, barrier work, and close-range dominance take priority. The 31-round magazine system integrates seamlessly with standard AR-platform accessories and optic mounting solutions, enabling rapid customization to mission-specific requirements. This rifle pairs exceptionally well with sound suppressors—a defining advantage of the .300 Blackout cartridge—and performs reliably with both military-spec and commercial-loaded ammunition across the full velocity envelope.