The Diamondback DB Barrel (brand part number DB6.5M18M50B8-R) is an 18-inch 6.5 Grendel barrel built to replace a worn-out barrel or finish out a new build. Diamondback machines it from 4150 chrome-moly-vanadium steel, rifles it with a 1:8-inch twist to stabilize heavier 6.5 Grendel bullets, and runs a mid-length gas system for softer cycling than a standard-length setup. The black nitride finish adds corrosion resistance and a smoother bore surface without the added cost of stainless steel.

Key Specifications

• Chambered in 6.5mm Grendel.
• Measures 18 inches in barrel length.
• Rifled with a 1:8-inch twist.
• Runs a mid-length gas system.
• Machined from 4150 chrome-moly-vanadium steel.
• Finished in black nitride.

Frequently Asked Questions

What gas system does this use? A mid-length gas system.

What twist rate does it use? 1:8 inches, sized for heavier 6.5 Grendel bullets.

What is the barrel made from? 4150 chrome-moly-vanadium steel, finished in black nitride.

Buy the Diamondback DB Barrel, 6.5 Grendel, 18 Inch, Mid-Length, Black Nitride

Finish your 6.5 Grendel build or replace a worn barrel. Order it from our Diamondback Firearms lineup, part of our AR barrels selection, at our Lubbock, Texas gun shop for fast, direct shipping.