These barrels are chambered in 5.56 NATO, made from 4140 steel , heat treated to RC 25-32, and chrome lined. Fluted models feature YHM’s diamond fluting to improve rigidity and aid in barrel cooling. These barrels feature M4 style feed ramps for reliable function. Threaded models feature 1/2"-28 threads for YHM muzzle brakes, flash hiders, and suppressor.

Available Threaded with a 1:7" or 1:9" twist.