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The Lead & Steel LLC LS556PEN-MID-13.9 is a 5.56mm AR-15 barrel with 13.90-inch length, pencil profile and mid-length gas system. Made from 4150 Chrome Moly Vanadium steel with QPQ Black Nitride finish, it features M4 feed ramps and 1:7 twist rate for reliable performance.
AR-15 builders choose this Lead & Steel LLC barrel for precise engineering and seamless integration into custom projects.