The Geissele Cold Hammer Forged 5.56 NATO 13.9" 1:7" 1/2x28 Chrome Lined Barrel 05-2989 is a high-performance barrel designed for reliability and accuracy. Constructed from chrome moly vanadium steel, this barrel features a mid-length gas system, M4 feed ramps, and a manganese phosphate finish. The cold hammer forging process ensures consistent rifling and extended barrel life, making it suitable for a wide range of applications, from duty weapons to competition rifles. Geissele Automatics Geissele Cold Hammer Forged 5.56 NATO 13.9" 1:7" 1/2x28 Chrome Lined Barrel 05-2989