The Ballistic Advantage Modern Series 5.56x45mm NATO Barrel (brand part number BABL556005M) is a 10.5-inch, Government profile barrel machined from 4150 Chrome Moly Vanadium steel and finished in a corrosion-resistant QPQ coating. Ballistic Advantage also QPQ-coats the M4 feed ramp extension for smoother, more reliable feeding, and the muzzle ships threaded, ready for a compensator or other muzzle device. Rifled at a 1:7 twist, it’s built for AR-15 platforms that need a compact, maneuverable barrel length. Because it measures under 16 inches, federal law restricts this barrel to pistol-configured AR lowers, registered SBRs, or registered machine guns; it cannot legally be installed on a standard rifle-configured lower.

Key Specifications

• Chambered in 5.56x45mm NATO.
• Measures 10.5 inches in length.
• Rifled at a 1:7 twist.
• Machined from 4150 Chrome Moly Vanadium steel.
• Finished in a corrosion-resistant QPQ coating.
• Features a QPQ-coated M4 feed ramp extension.
• Cut in Government profile.
• Ships threaded at the muzzle.
• Built for AR-15 platforms.

Frequently Asked Questions

Is there a legal restriction on how I can use this barrel? Yes. Because it’s under 16 inches, federal law only allows this barrel on a pistol-configured AR lower, a registered SBR, or a registered machine gun. Installing it on a standard, unregistered rifle-configured lower is illegal.

What profile is this barrel? Government profile.

Is the muzzle threaded? Yes.

Buy the Ballistic Advantage Modern Series 10.5-inch Government Barrel

Ballistic Advantage built this barrel for pistol-length AR builders who want proven 4150 CMV construction and a QPQ finish in a compact, maneuverable package. Just confirm your lower’s configuration is legal for a sub-16-inch barrel before you install it. Shop more Ballistic Advantage parts or browse our full AR barrels selection to complete your build. Order it from our Lubbock, Texas gun shop for fast, reliable shipping.