This barrel is chambered in 5.56 NATO, made from 4140 steel , heat
treated to RC 25-32, and chrome lined. Fluted models feature YHMís
diamond fluting to improve rigidity and aid in barrel cooling. This barrel feature M4 style feed ramps for reliable function. Threaded
models feature 1/2"-28 threads for YHM muzzle brakes, flash hiders, and
suppressors.† This barrel has a 1:9" twist.Please Contact Your Local Class 3 Dealer To Purchase.
Our barrels are designed to fit a 0.750" gas block. †