Kaw Valley Precision 9mm Caliber 4150 QPQ AR-15 Barrel 10.5in Black Medium. KVP 9MM barrels have an integrated feed ramp and will work with both Colt and Glock style AR-9 rifles or pistols. All barrels are manufactured under ISO:9001 & AS:9100 quality certifications. Specifications for Kaw Valley Precision 9mm Caliber 4150 QPQ AR-15 Barrel: Manufacturer: Kaw Valley Precision Color: Black Finish: QPQ Fabric/Material: 4150 CMV Steel Caliber: 9mm Luger Barrel Profile: Light Threads per Inch: 1/2x36 Barrel Twist Rate: 1-10 Gun Make: AR Platform Gun Model: AR-15 Condition: New Features of Kaw Valley Precision 9mm Caliber 4150 QPQ AR-15 Barrel Integrated feed ramp 11-degree Target Crown Package Contents: Kaw Valley Precision 9mm Caliber 4150 QPQ AR-15 Barrel What firearm models does the manufacturer say Kaw Valley Precision 9mm Caliber 4150 QPQ AR-15 Barrel is compatible with? The manufacturer says that Kaw Valley Precision 9mm Caliber 4150 QPQ AR-15 Barrel is compatible with AR-15Kaw Valley Precision KVP-9MM-BBL-10: 9mm Caliber 4150 QPQ AR-15 Barrel 10.5in Black Medium