The Diamondback DB Barrel (brand part no. DB300P16H50B8-R) is a 300 Blackout, 16-inch AR barrel with a pistol-length gas system, built for a builder replacing a worn barrel or finishing a fresh upper. Diamondback Firearms machines it from 4150 chrome-moly vanadium steel and finishes it in black nitride for corrosion and wear resistance, with a 1:8 rate of twist cut to stabilize a wide range of 300 Blackout bullet weights, from lightweight supersonic loads to heavier subsonic rounds.

Key Specifications

• Chambered in 300 Blackout.
• Barrel length of 16 inches.
• Built with a pistol-length gas system.
• Machined from 4150 chrome-moly vanadium steel.
• Finished in black nitride for corrosion and wear resistance.
• 1:8 rate of twist stabilizes a wide range of bullet weights.

Frequently Asked Questions

What caliber is this barrel chambered in? 300 Blackout.

What gas system length does it use? Pistol-length.

What is the rate of twist? 1:8, suited to a wide range of 300 Blackout bullet weights.

Buy the Diamondback DB Barrel

Finish or refresh a 300 Blackout AR build with a genuine nitride-finished barrel. Order it from our AR barrels selection at our Lubbock, Texas gun shop for fast, direct shipping.