These precision CNC made model AR-7 Explorer Rifle Barrels are all steel, made of 4140 chrome moly steel or 416 stainless steel, in both blue and stainless steel finishes, and available Nitride Finish on select models! Available in target and sporter contours, with options of standard, threaded or Fluted! These barrels will fit Armalite, Charter Arms, Survival Arms, AR-7 Industries and Henry manufactured rifles.