VALUE-LINE 308 WIN 10.5" Carbine Gas AR10 Barrel- Nitride* Chamber- 308 Winchester/ 7.62 NATO* Length- 10.5"* Gas system- Carbine Length* Gas Block Size- .750* Threads- 5/8-24* Finish- Nitride* Twist- 1:10* Material- 41V50 Chrome Moly Vanadium * Extension- DPMS LR-308* Barrel dimpled for gas block set screw* Marked for Caliber and Twist* Weight- 31.9 OZ* Fully Made In House From KAK Industry Produced BlanksMedium Contour All Barrels Are Air Gauge Inspected for Correct Bore Size & Tolerances, completed Barrels are Inspected for Proper Headspace using Calibrated Gauging.