CMMG 16" Barrel and BCG Kit 4140CM SBN 9mm Luger, Black Nitride - 99DE642

This is a complete 16" barrel and bolt carrier group kit chambered in 9mm Luger, designed for AR-15 platforms using CMMG's radial delayed blowback system. The barrel features 4140 chrome moly steel with salt bath nitride finish inside and out, 1:10 twist rate, and 1/2-28 threads. Installation requires an enlarged ejection port for reliable operation with the patent-pending radial delayed blowback bolt.