7.62x39 18" AR15 Barrel, Mid Gas, 416R Stainless* Chamber- 7.62x39* Length- 18"* Gas system- Mid Length* Gas Block Size- .750* Threads- 5/8-24* Finish- Matte Blasted Grey* Twist- 1:9:5* Material- 416R Stainless* Extension- M4 Ramps* Marked for Caliber and Twist* Weight- * 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.