VALUE-LINE 9MM 16.0" AR15 Barrel* Chamber- 9MM* Length- 16" (15.5" when compared to a standard AR15 barrel for handguard measurements) * Threads- 1/2-36* Finish- Nitride * Twist- 1:10* Material- 41V50* Marked for Caliber and Twist* Weight- 26.07 OZ* Fully Made In House From KAK Industry Produced BlanksGovt Carbine Style Profile All Barrels Are Air Gauge Inspected for Correct Bore Size & Tolerances, completed Barrels are Inspected for Proper Headspace using Calibrated Gauging.