The Rosco Manufacturing Rosco Bl Bbl 14.5" 9mm AR Barrel Nitride is a dedicated pistol-caliber carbine barrel built for shooters who want dependable performance in an AR-15 platform. This Bloodline series barrel uses a 14.5" length with a threaded muzzle to accept compatible devices, and is machined from durable 4150 CMV steel with a nitride treatment for long service life and consistent accuracy.

Designed around 9×19/9mm ammunition and a blowback operating system, this medium-profile barrel is well suited for USPSA PCC competition, range training, and general recreational shooting. The 1:10 twist rate is optimized for a wide range of common 9mm loads, helping maintain predictable ballistics whether you prefer standard, subsonic, or defensive ammunition. Rosco Manufacturing’s Bloodline barrels are known for careful engineering and solid craftsmanship, making this 14.5" 9mm option a reliable foundation for your next AR-15 build.

• Manufacturer: Rosco Manufacturing
• Model: BL-145-M4-9MM-10 Bloodline 14.5" 9mm Barrel
• Caliber: 9mm / 9×19
• Barrel Length: 14.5"
• Barrel Profile: Medium
• Twist Rate: 1:10
• Gas System Length: Blowback