The Diamondback DB15BG in 6.5mm Grendel (MPN DB1732N061) is a semi-automatic AR-platform rifle finished in FDE, pairing an 18-inch barrel with a 1-in-8 twist tuned for heavier Grendel bullets. Diamondback Firearms builds the DB15BG with a V-profile handguard for accessory mounting, and the rifle feeds from a detachable magazine with a 28+1 capacity. Two magazines ship with the rifle: a 30-round PMAG and a 5-round capacity-compliant magazine. No sights are installed, leaving the rifle ready for an optic. Among AR-platform rifles in the AR rifles category, the DB15BG favors shooters who want the flatter trajectory of 6.5 Grendel in an AR-15-size platform.

Key Specifications

• Chambered in 6.5mm Grendel with a 1-in-8 rate of twist.
• Operates as a semi-automatic rifle.
• Features an 18-inch barrel.
• Finished in FDE.
• Feeds from a detachable magazine with a 28+1 capacity.
• Ships with two magazines: a 30-round PMAG and a 5-round capacity-compliant magazine.
• Overall length is 32.75 inches.
• Ships with no sights installed, ready for an optic.
• Ships at approximately 9.1 pounds.

Frequently Asked Questions

Does this rifle come with sights? No, it ships without sights, ready for an optic to be mounted.

How many magazines are included? Two: a 30-round PMAG and a 5-round capacity-compliant magazine.

What twist rate does this barrel use? A 1-in-8 twist, tuned for heavier 6.5 Grendel bullets.

Buy the Diamondback DB15BG 6.5 Grendel

The flatter trajectory of 6.5 Grendel in an AR-platform rifle is exactly what the DB15BG delivers. Order it from our Lubbock, Texas gun shop for fast, insured shipping to your FFL.