Dbb Bbl 556 10.5" Carbine 1/9 Blk - DBB556C105M50B9-R

The Diamondback Barrels DBB Bbl 556 10.5" Carbine 1/9 Blk is a precision-engineered barrel purpose-built for short-stroke rifle builds and CQB-focused tactical platforms. Designed for law enforcement, military personnel, and serious civilian operators, this 10.5-inch barrel delivers the velocity and reliability required for intermediate-range engagements while maintaining the compact profile essential in close-quarters environments. The carbine-length gas system ensures reliable cycling across a wide range of ammunition loads and environmental conditions.

Manufactured from high-quality 4150 chrome-moly steel and finished with a nitride hardening process, the Diamondback barrel offers superior wear resistance and corrosion protection in demanding field conditions. The 1:9 twist rate is the industry standard for 5.56 NATO/.223 Remington ammunition, providing excellent stability across the full spectrum of bullet weights from 55-grain varmint rounds through 77-grain match-grade loads. The medium profile design balances barrel stiffness with reduced weight, improving ergonomics without sacrificing accuracy or durability. Nitride finish eliminates the need for constant maintenance while maintaining a professional matte-black appearance.

This barrel excels in AR-15 platforms configured for home defense, patrol carbines, and tactical training environments. Installation requires standard AR-15 barrel extension and upper receiver compatibility; gunsmiths and experienced builders can complete installation with basic armorer tools. Weighing 1.31 pounds, the compact 10.5-inch profile—measuring 11.25 inches overall with extension—reduces overall rifle length to approximately 28–32 inches depending on buttstock selection, making it ideal for vehicle storage and tactical deployment. The carbine-length gas tube ensures compatibility with standard Mil-Spec AR-15 components and maintains consistent bolt cycling reliability.