The Lead & Steel 5.56mm barrel (brand part no. LS556PEN-MID-16) is a 16-inch pencil profile AR barrel with M4 feed ramps, turned from 4150 Chrome-Moly-Vanadium steel and coated in a QPQ Black Nitride finish for a durable, corrosion-resistant build.

Key Specifications

• Chambered in 5.56mm.
• Cut to 16-inch overall length.
• Rifled with a 1:7 twist rate.
• Pencil profile contour.
• Turned from 4150 Chrome-Moly-Vanadium steel for fatigue strength under sustained firing.
• Finished with a QPQ Black Nitride coating for corrosion and wear resistance.
• Features M4 feed ramps for reliable feeding in mid-length and carbine-length AR builds.

Frequently Asked Questions

What caliber is this barrel chambered in? It is chambered in 5.56mm.

What twist rate does it use? It uses a 1:7 twist rate.

Does it have M4 feed ramps? Yes, it features M4 feed ramps for reliable feeding in mid-length builds.

Buy the Lead & Steel 5.56mm Barrel, 16-inch Pencil Profile

Order the Lead & Steel 5.56mm barrel from our Lubbock, Texas gun shop for a durable nitride-finished build barrel. See the rest of our AR barrels lineup for other AR barrel lengths and calibers.