The Ballistic Advantage 5.56 NATO 14.5-inch M4 Profile Carbine-Length barrel (brand part no. BABL556009M) is built for shooters who want a proven, mil-spec-pattern upgrade without gambling on an unknown maker. Part of the Modern Series line, this barrel is machined from 4150 Chrome Moly Vanadium steel for the strength and heat tolerance serious range time and duty use demand. A QPQ corrosion-resistant finish protects the bore and exterior from rust and wear, while a QPQ-coated M4 feed ramp extension keeps feeding reliable round after round. Whether you’re building a carbine-length AR-15 for home defense or a range gun that needs to run hard, this barrel gives you a dependable foundation.

Key Specifications

• Chambered in .223 Rem/5.56 NATO, the most common and versatile AR-15 caliber for range and duty use.
• Barrel length of 14.5 inches, the classic carbine-length configuration for maneuverable AR builds.
• Machined in the M4 profile, giving the barrel a heavier contour under the handguard for added rigidity.
• Built with a Carbine-length gas system, matched to the 14.5in length for reliable cycling.
• Constructed from 4150 Chrome Moly Vanadium steel, the same alloy trusted in mil-spec barrels for strength and heat resistance.
• Finished with a QPQ corrosion-resistant coating that guards against rust in the field.
• Includes a QPQ-coated M4 feed ramp extension for smoother, more reliable feeding.
• Part of Ballistic Advantage’s Modern Series barrel line, built to consistent, repeatable tolerances.
• Rifling twist rate: 1:7 inch, stabilizing the full range of common 5.56/.223 bullet weights.

Frequently Asked Questions

What gas system length does this barrel use? It uses a carbine-length gas system, matched to the 14.5in barrel length for reliable AR-15 cycling.

What is the barrel profile? It’s cut to the M4 profile, giving a heavier contour under the handguard than a pencil-profile barrel.

Can I install this on any AR-15 lower? Since this is a bare 14.5in barrel under the 16in federal rifle minimum with no lower included, federal Short-Barreled Rifle rules only come into play once it’s assembled onto a complete, shouldered rifle. Installing it on an unregistered rifle configuration without a prior approved ATF Form 1 would create an illegal SBR, so confirm your build’s configuration and registration status before assembly.

Buy the Ballistic Advantage 5.56 NATO 14.5in M4 Carbine-Length Barrel

Order this barrel from Ballistic Advantage, a name AR builders trust for consistent, mil-spec-pattern components, browsable in our full AR barrels selection. Ships fast from our Lubbock, Texas gun shop with fast, insured delivery.