The Ballistic Advantage 9mm 5.5-Inch Barrel (brand part no. BABL9MM001M) is a Modern Series AR-15 barrel built for compact 9mm pistol-caliber carbine builds. Ballistic Advantage machines it from 4150 chrome moly vanadium steel and threads the muzzle 1/2×28 for a compensator, suppressor, or thread protector. A 1:10 twist rate is matched to standard 9mm bullet weights for reliable stabilization, giving builders a short, dependable barrel for a compact 9mm AR platform. It is a direct, no-compromise upgrade for anyone assembling a short-barreled 9mm AR-15 pistol.

Key Specifications

• Chambered in 9mm.
• Measures 5.5 inches in length.
• Machined from 4150 chrome moly vanadium steel.
• Threaded 1/2×28 at the muzzle.
• Rifled with a 1:10 twist rate.
• Part of Ballistic Advantage’s Modern Series barrel line.

Frequently Asked Questions

What twist rate does this barrel use? A 1:10 twist, matched to standard 9mm bullet weights.

Is the muzzle threaded? Yes, it is threaded 1/2×28 for a compensator, suppressor, or thread protector.

Buy the Ballistic Advantage 9mm 5.5-Inch Barrel

A short, dependable 9mm barrel with standard 1/2×28 threading makes this a straightforward pick for any compact 9mm AR build. Browse more AR15 barrels and order yours from our Lubbock, Texas gun shop for fast shipping.