The Diamondback DB Barrel (brand part number DB7.62X39P7H50B9.5-R) is a 7-inch AR-platform barrel chambered in 7.62x39mm, built for a barrel swap or a new build on a pistol-length gas system. Machined from 4150 chrome-moly-vanadium steel and finished in black nitride, it’s cut with a 1:9.5-inch twist to stabilize typical 7.62x39mm bullet weights and coated for corrosion resistance and long service life. The pistol-length gas system matches the short barrel length for reliable cycling in a compact build. Whether you’re replacing a worn barrel or finishing out a new upper, this barrel is ready to headspace and install.

Key Specifications

• Chambered in 7.62x39mm for AR-platform builds running that cartridge.
• Cut to a 7-inch barrel length, suited to compact pistol-length builds.
• Rifled at a 1:9.5-inch twist rate, matched to typical 7.62x39mm bullet weights.
• Machined from 4150 chrome-moly-vanadium steel for strength and heat resistance.
• Finished in black nitride for corrosion resistance and a durable, low-glare exterior.
• Built with a pistol-length gas system to match the barrel’s short length.

Frequently Asked Questions

What gas system length does this barrel use? It’s built with a pistol-length gas system, matched to the 7-inch barrel length.

What twist rate does it use? A 1:9.5-inch twist rate, which stabilizes typical 7.62x39mm bullet weights.

What is the barrel finished in? Black nitride over 4150 chrome-moly-vanadium steel, for corrosion resistance and durability.

Buy the Diamondback 7.62x39mm 7-Inch AR Barrel, Black Nitride

Finish your build or refresh a worn barrel with a purpose-built 7.62x39mm option. Order this Diamondback barrel, part of our full AR barrels selection, from our Lubbock, Texas gun shop for fast, direct shipping.