Armalite's barrels are custom-made for extreme accuracy and long life.
This complete AR-10 SuperSASS barrel assembly includes an adjustable gas block, barrel nut, gas tube.
.875 at the Journal (Under the gas block)
Model: AR-10 SuperSASS barrel assembly
Caliber: 7.62X51 mm / .308
Barrel: 20" triple lapped, ceramic coated AISI 416R stainless steel match, threaded 5/8x24, M-4 feed ramps
Rifling Twist: 1:10" RH
Muzzle Device: Flash suppressor
Front Sight Base: None