Diamondback DB Barrel, 5.56x45mm NATO, 10in Carbine-Length, Black Nitride 4150 CMV

The Diamondback DB Barrel (brand part no. DB556C10M50B8-R) is a 10-inch 5.56x45mm NATO barrel built for carbine-length AR builds and finish-your-own projects. Machined from 4150 chrome-moly-vanadium steel and finished in black nitride for corrosion resistance and easy cleanup, it’s cut with a 1:8-inch twist rate that stabilizes the full range of common 5.56/.223 bullet weights. Whether it’s replacing a worn factory barrel or finishing out a new build, this barrel gives builders a straightforward, drop-in option sized for a carbine-length gas system.

Key Specifications

• Chambered in 5.56x45mm NATO.
• 10-inch barrel length sized for carbine-length AR builds.
• Cut with a 1:8-inch twist rate suited to common 5.56/.223 bullet weights.
• Machined from 4150 chrome-moly-vanadium steel for durability.
• Finished in black nitride for corrosion resistance and easy cleaning.
• Sized for a carbine-length gas system.

Frequently Asked Questions

What gas system length does this barrel need? It’s cut for a carbine-length gas system.

What twist rate does it use? A 1:8-inch twist, suited to the common range of 5.56/.223 bullet weights.

What’s the barrel finished in? Black nitride over 4150 chrome-moly-vanadium steel.

Buy the Diamondback DB Barrel, 5.56x45mm NATO, 10in Carbine-Length

Finish your carbine-length 5.56 build with a durable, ready-to-run barrel. Order it from our Diamondback Firearms lineup, part of our gun parts selection, at our Lubbock, Texas gun shop as soon as it’s available to ship.