Ballistic Advantage 5.5″ Barrel Features This 5.5″ AR-15 Barrel is precision-machined with a straight contour, making it lightweight at just 9.6 oz, while maintaining structural integrity for consistent accuracy. The QPQ (Quench Polish Quench) finish enhances corrosion resistance and durability, ensuring reliable performance in any condition. Its 1-10 twist rate is optimized for stabilizing a variety of 9mm bullet weights. The barrel features a blowback gas system, ideal for pistol-caliber carbines and short-barreled AR builds. With 1/2-28 muzzle threads, it is compatible with most muzzle devices and suppressors, allowing for customization to meet your shooting needs. The compact size makes this barrel an excellent choice for AR-15 pistol builds chambered in 9mm Luger. Ballistic Advantage 5.5″ Barrel Specifications Manufacturer: Ballistic Advantage Make: AR-15 Cartridge: 9mm Luger Barrel Length: 5.5″ Gas System Length: Blowback Barrel Weight: 9.6 oz Contour: Straight Twist Rate: 1-10 Muzzle Threads: 1/2-28 Finish: QPQ More Information Condition New in Box Finish Per Color Black Manufacturer Ballistic Advantage Manufacturer Part Number BABL9MM001M Model AR Barrel Type AR Barrels UPC 819747025975
