Our barrel is made of 416 Stainless Steel, Heat Treated to RC 28-32 Hardness, and Stress Relieved. They are Drilled, Reamed, Rifled, Turned, and fluted on our CNC Machines. It is a 18” HBAR cut barrel with straight flutes. It has a 1/8 twist with a mid-length gas system. This barrel is Chambered in .223 Wylde and has M4 feed ramps. Diameter of the barrel is .750" and the thread pitch at the muzzle is 1/2X28. Our testing shows with appropriate ammo, optic, and shooting skills one could expect accuracy of less than .5" MOA at 100 yards.