Lead & Steel 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.
- 13.90-inch mid-length pencil profile
- 4150 Chrome Moly Vanadium construction
- 1:7 twist with QPQ Nitride finish