Product Description Complete your AR build or upgrade your existing setup with the Diamondback DB Barrel in 5.56x45mm NATO. Measuring 5.50 inches, this pistol-length barrel is purpose-built for compact AR pistol configurations. Constructed from 4150 Chrome Moly Vanadium (CMV) steel and finished with a durable black nitride coating, it offers exceptional corrosion resistance and long-lasting performance under demanding conditions. The pistol-length gas system ensures reliable cycling in a short-barreled platform, while the 1:8" twist rate stabilizes a wide range of 5.56mm projectile weights for accurate, consistent results. Product Highlights Premium 4150 Chrome Moly Vanadium Steel: Delivers superior strength, durability, and heat resistance for high-volume shooting. Black Nitride Finish: Provides excellent corrosion and wear resistance, extending the service life of the barrel. Pistol-Length Gas System: Optimized for short-barrel AR pistol builds, ensuring reliable and consistent cycling. 1:8" Twist Rate: Stabilizes a broad spectrum of 5.56x45mm NATO projectile weights for versatile and accurate performance. 5.50" Compact Profile: Ideal for highly maneuverable AR pistol configurations without sacrificing reliability. Specs Brand: Diamondback Model: DB Barrel Caliber: 5.56x45mm NATO Barrel Length: 5.50" Gas System: Pistol-Length Material: 4150 Chrome Moly Vanadium (CMV) Steel Finish: Black Nitride Rate of Twist: 1:8" MPN: DB556P5.5H50B8-R UPC: 815875019152 Disclaimer: We strive to provide accurate and up-to-date product descriptions, specifications, and images; however, errors or omissions may occasionally occur. We are not responsible for any inaccuracies or discrepancies in the content provided. If you notice anything incorrect or unclear, please contact us so we can correct it. When in doubt, we recommend verifying details directly with the product&';s manufacturer. ]]>