Diamondback DB15BG DB15 6.5 Grendel 18″ M-LOK

The Diamondback DB15BG is a purpose-built, semi-automatic AR-pattern rifle chambered in 6.5 Grendel with an 18-inch mid-length barrel. It pairs a 15-inch M-LOK handguard and Magpul furniture with forged 7075-T6 receivers and a Mil-Spec bolt carrier for a durable, modular platform suited to precision-oriented shooting and adaptable accessory fitment. The rifle’s mid-length gas system and threaded muzzle with a Diamondback CNC DBSB-IV flash hider provide a balance of recoil impulse and accessory compatibility.

Key Specifications

• Chambering is 6.5 Grendel.
• The barrel measures 18 inches and is 4150 chrome-moly (CrMoV) with a black nitride finish.
• The rate of twist is 1:8 RH.
• The gas system is mid-length.
• The bolt carrier is shot-peened Mil-Spec 8620.
• Upper and lower receivers are forged 7075-T6 aluminum.
• The handguard is a 15-inch M-LOK V-rail with anti-slip texture pads.
• Furniture includes a Magpul CTR stock and Magpul MOE K2 grip.
• The muzzle device is a Diamondback CNC DBSB-IV flash hider, threaded 5/8×24.
• Unloaded weight is listed as 6.8 lbs..

Built around proven materials and common AR-pattern components, the DB15BG gives experienced shooters a familiar platform with a 6.5 Grendel chambering and long-contour 18″ barrel for extended-range capability in a modular format. The 15″ M-LOK handguard supports modern accessory mounting while Magpul furniture provides a known ergonomic interface. This configuration is intended for shooters who prioritize a capable, serviceable rifle platform with room for optics and mission-specific accessories.

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