The Rosco Manufacturing Rosco 10.5" M4 9MM NATO Bloodline Barrel is built as a dedicated AR-9 barrel for shooters who want dependable performance in a compact package. Its 10.5 inch length, nitride finish, and 4150 CMV steel construction provide a durable, corrosion resistant barrel that is ready for hard use while maintaining consistent accuracy. A threaded muzzle and carefully selected twist rate support modern 9mm loads and common muzzle devices.

This barrel is well suited for AR-9 pistol and SBR builds focused on range use, training, and general-purpose shooting where reliability and controllable recoil matter. The combination of 9mm chambering, carbine gas system design, and quality materials makes it a practical choice for builders who want a smooth shooting, compact carbine. Rosco Manufacturing’s attention to detail and proven barrel craftsmanship are evident throughout this Bloodline series component.

• Manufacturer: Rosco Manufacturing
• Model: M4
• Caliber: 9mm
• Barrel Length: 10.5 inches
• Type: Barrel
• Finish Color: Nitride, Black
• Twist Rate: 1:7