The Ballistic Advantage Performance Series 5.56x45mm NATO Barrel in 13.9 inches, mid-length gas system (brand part no. BABL556037F) is machined from chrome moly vanadium steel and finished with a black QPQ corrosion-resistant coating. An extended, Nickel Boron-coated M4 feed ramp is engineered for reliable feeding under hard use, a hallmark of Ballistic Advantage’s Performance Series lineup. It gives builders a middle-ground barrel length between a compact pistol build and a full 16-inch rifle.

Key Specifications

• Chambered for 5.56x45mm NATO.
• Barrel length measures 13.9 inches.
• Rifling uses a 1:7-inch twist rate, stabilizing heavier 5.56 bullet weights.
• Machined from chrome moly vanadium (CrMoV) steel.
• Finished in a black QPQ corrosion-resistant coating.
• The feed ramp is an extended, Nickel Boron-coated M4 feed ramp extension for smoother feeding.
• Runs a mid-length gas system, built on Ballistic Advantage’s Hanson profile.
• Is not designed for use with aftermarket piston kits, like other Hanson-profile barrels.
• Built for the AR-15 platform, drop-in compatible with mil-spec upper receivers.

Frequently Asked Questions

What twist rate does this barrel use? A 1:7-inch twist rate, stabilizing heavier 5.56 bullet weights.

What gas system does it use? A mid-length gas system.

What is the feed ramp coated with? Nickel Boron, for smoother, more reliable feeding.

Will this work with a piston conversion? No, Hanson-profile barrels like this one are not designed to work with aftermarket piston kits.

Buy the Ballistic Advantage Performance Series Barrel

Build a mid-length 5.56 AR15 upper around a durable, corrosion-resistant CrMoV barrel. Browse more Ballistic Advantage parts in our AR barrels selection and order this barrel from our Lubbock, Texas gun shop as soon as it’s ready to ship.