Aye, my old Norc M4 was very accurate and extremely reliable.
Their barrels are cold hammer forged and made of good quality steel.
Definitely well cut anyhow as I have been very surprised personally firing them. Have not seen one that did not shoot very well yet.
Been debating buying one of the DA556 from CanAmmo with the 1:9 pencil barrel 20" to swap the Chinese barrel out for my Colt 1:12 pencil barrel that's on my M16A1 clone now