18" AR15 12.7x42 Barrel

This AR-15 18" heavy, parkerized 12.7x42 barrel has a mid-length gas system with a 1:20 twist . Our 12.7x42 parkerized rifle barrels are made from the finest 4150 Chrome Moly Vanadium and precisely rifled for high accuracy at a great price. Use a ar barrel in your AR15 next build and experience superior performance.