The ONE HORSE 16" barrel is precision-engineered for 5.56 NATO chambering with a 1:8 twist rate optimized for modern ammunition performance.ONE HORSE 16" Mid-Length SOCOM Profile Barrel5.56 NATO chamber specification1:8 twist rate for superior bullet stabilizationMid-length gas system configurationSteel construction for durability and accuracySOCOM profile for enhanced performanceDimensions: 1.45 X 4.05 X 18.00 inchesIdeal for AR-15 builds requiring precision accuracy and reliable performance this barrel delivers consistent results for tactical competition or recreational shooting applications.