KAK INDUSTRY 10.5 9X39 1:7 STAINLESS BARREL * Chamber- 9x39 * Length- 10.5" * Gas system- Pistol 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- 18.24 OZ * Gas Block Dimples * Fully Made In House From KAK Industry Produced Blanks All Barrels Are Air Gauge Inspected for Correct Bore Size & Tolerances, completed Barrels are Inspected for Proper Headspace using Calibrated Gauging. DESIGNED TO BE USED WITH FACTORY WOLF 278 GRAIN SUBSONIC AMMO ***These barrels are designed to be run suppressed. Attempting to run them unsuppressed could lead to issues outside of KAK 's control in which we hold no liability.