The Diamondback DB Barrel 300P85H50B8R is an 8.5-inch AR-15 barrel chambered in .300 Blackout, built for reliability and durability in pistol-length configurations. It is constructed from 4150 chrome moly vanadium steel and features a tough black nitride finish for enhanced corrosion and wear resistance.
Durable 4150 CMV steel with black nitride finish
Pistol-length gas system in heavy profile design
1:8 twist rate for .300 Blackout AR-15 builds
This Diamondback barrel offers consistent performance and rugged quality for AR-15 pistol or SBR projects using .300 Blackout. Its materials and configuration are trusted for both new builds and OEM replacements.