You've picked from great uppers and lower for your .308 custom build, now is the time to outfit that bad boy with a barrel! Select your preferred barrel length, barrel profile, and material.All barrels feature button rifling with a twist rate of 1:10 inch, .750 diameter gas block journal, threaded muzzle of 5/8x24, and come assembled with a DPMS barrel extension. All stainless barrels are made from 416R stainless steel, and ar