PW9 AR Pistol Barrel 9mm 1-10 Twist 1/2-28 Thread 4.5in Black 4.5in. 5in Over all length Specifications for PW9 AR Pistol Barrel 9mm: Manufacturer: PW9 Color: Black Finish: Nitride Fabric/Material: 4150 Steel Caliber: 9mm Luger Barrel Profile: Standard Threads per Inch: 1/2x28 Barrel Twist Rate: 1-10 Flutes: No Gun Make: AR Platform Gun Model: AR-9 Condition: New Package Contents: PW9 AR Pistol Barrel 9mm What firearm models does the manufacturer say PW9 AR Pistol Barrel 9mm is compatible with? The manufacturer says that PW9 AR Pistol Barrel 9mm is compatible with AR-9PW9 PW98292B12: AR Pistol Barrel 9mm 1-10 Twist 1/2-28 Thread 4.5in Black 4.5in