KAK Industry 9X39 16" AR15 barrel SUPERSONICThis barrel is designed to be used with supersonic 9x39 rounds* Chamber- 9x39* Length- 16"* Gas system- Carbine Length* Gas Block Size- .750* Threads- 5/8-24* Finish- Matte Blasted Grey* Twist- 1:7* Material- 416R Stainless* Extension- M4 Ramps* Marked for Caliber and Twist* Weight- 29.88 OZ* Gas Block Dimples* Fully Made In House From KAK Industry Produced BlanksAll Barrels Are Air Gauge Inspected for Correct Bore Size & Tolerances, completed Barrels are Inspected for Proper Headspace using Calibrated Gauging.