18" AR15 12.7x42 Barrel AR15 12.7x42-Barrel AR15-Barrel 12.7x42-AR15

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.