Eighteen inch button-broached, chrome-lined, alloy steel barrel with A2-style compensator. 1:7 inch right hand twist rate. A2-style front sight (F height); back up iron sight; fixed stock. Knights Armament M5 forearm with RAS adapter rail and rail adapter covers. Includes aluminum 30-round magazine. Trigger pull adjustable from 4.75 to 7.75 pounds.