Diamondback Firearms DB15 6.5 Grendel 18" - AR-15 Rifle

Long-range performance without a new platform — the Diamondback Firearms DB15 6.5 Grendel 18" brings 6.5 Grendel precision to a standard AR-15 lower receiver, bridging the gap between carbine convenience and genuine reach.

Built as a semi-automatic AR-15 rifle around 6.5 Grendel and a direct impingement system, the Diamondback Firearms DB15 6.5 Grendel 18" delivers a proven AR-15 experience from first round to last.

Extended Effective Range: The 6.5 Grendel cartridge maintains significantly better ballistic performance past 300 yards than 5.56 NATO — this is the platform for shooters who need genuine reach from an AR-15.

AR-15 Lower Compatibility: Standard AR-15 lower receivers work without modification. Caliber-specific BCG and magazines are the only requirements, preserving your existing lower investment.

Hunting Viability: Improved terminal energy makes 6.5 Grendel suitable for deer and medium game at distances where 5.56 runs out of steam — a meaningful expansion of what this AR-15 platform can do.

Precision Potential: The 18" barrel maximizes 6.5 Grendel velocity and accuracy at the ranges where its performance advantage over 5.56 is most pronounced.

• Caliber: 6.5 Grendel
• Barrel Length: 18"
• Gas System: Direct Impingement
• Handguard: Free-Float
• Muzzle Threading: 1/2x28
• Magazine Capacity: 30-Round
• Finish: Type III Hardcoat Anodized
• Origin: Made in the USA

Uses a standard AR-15 lower receiver with caliber-specific BCG and 6.5 Grendel magazines. Compatible with mil-spec buffer systems and standard lower parts kits throughout.

Type III Hardcoat Anodized over 7075 aluminum construction gives this AR-15 rifle solid corrosion resistance and a durable surface that holds up across a wide range of storage and operating conditions.

A strong choice for PRS-style competition, deer hunting, and extended-range target shooting. The 6.5 Grendel cartridge delivers meaningfully better performance beyond 300 yards than standard 5.56.

Diamondback Firearms builds a full range of AR-15 rifles with an emphasis on reliability and value, offering solid performance at competitive price points. Made in the USA.