The Daniel Defense 16″ 5.56 NATO CHF Mid-Length 1:7 Lightweight Contour AR-15 Barrel is the perfect upgrade for your AR-15 build. This high quality barrel is constructed from cold hammer forged chrome moly vanadium steel for superior durability and performance. The 1:7 twist rate is optimal for stabilizing both heavier projectiles and lighter weight bullets. The lightweight contour profile helps to reduce weight and increase maneuverability while the 5.56 NATO chamber ensures compatibility with both NATO and commercial ammunition. This barrel also features a mil-spec phosphate coating and a carbine length gas system.