The Ballistic Advantage 5.56 NATO 13.9-inch Government Profile Mid-Length barrel (brand part no. BABL556035M) gives AR-15 builders a durable option for a pinned-and-welded or registered short-barrel configuration. Machined from 4150 Chrome Moly Vanadium steel and finished with a QPQ corrosion-resistant coating, this Modern Series barrel is built to hold up to sustained fire without sacrificing accuracy. A QPQ-coated M4 feed ramp extension keeps feeding smooth, making this a solid foundation for a home-defense or range-focused AR build.

Key Specifications

• Chambered in .223 Rem/5.56 NATO.
• Barrel length of 13.9 inches, close to the common 14in pinned-and-welded configuration.
• Machined in the Government profile for a heavier, more rigid contour.
• Built with a mid-length gas system for smoother, more reliable cycling.
• Constructed from 4150 Chrome Moly Vanadium steel for strength and heat resistance.
• Finished with a QPQ corrosion-resistant coating.
• Includes a QPQ-coated M4 feed ramp extension for reliable feeding.
• Part of Ballistic Advantage’s Modern Series barrel line.
• Rifling twist rate: 1:7 inch, stabilizing the full range of common 5.56/.223 bullet weights.

Frequently Asked Questions

What gas system does this barrel use? A mid-length gas system, matched to the 13.9in barrel length.

What material is this barrel made from? 4150 Chrome Moly Vanadium steel with a QPQ corrosion-resistant finish.

Is this barrel itself an NFA item? No. This is a bare 13.9in barrel under the 16in federal rifle minimum with no lower included, so it is not itself a regulated Short-Barreled Rifle. Federal SBR rules only apply once it’s assembled onto a complete, shouldered rifle lower without a prior approved ATF Form 1 — confirm your configuration before assembly.

Buy the Ballistic Advantage 5.56 NATO 13.9in Government Mid-Length Barrel

Order this barrel from Ballistic Advantage, or browse our full AR barrels selection. Ships fast from our Lubbock, Texas gun shop.