Elevate your rifle's performance with the Guntec USA 16" 5.56mm Barrel, designed for precision and reliability. This chrome-moly steel barrel ensures superior durability and features a 1:7 twist rate for enhanced accuracy. It's ideal for both building and upgrading your mid-length gas system rifle. Constructed from 4150 Chromoly Steel for strength Features a 5.56/.223 chambering for versatile ammunition 1:7 twist rate for stabilizing lighter and heavier projectiles 1/2 by 28 thread for muzzle device compatibility Engraved markings for easy identification .750 gas platform for reliable cycling Durable black nitride coating for corrosion resistance M4 feed ramps for reliable feeding Mid-length gas system for optimal performance Lightweight design at 28 oz Experience consistent results with this high-quality barrel, perfect for any performance-driven shooter.