I’ve just put together my first precision AR and have been going through the growing pains figuring out the whole POI shift with the flex in the barrel nut. I had no idea what a rabbit hole this was.
if you put a thermometer strip, an AR can be tuned to be accurate as certain temperature, but, all this gets kinda silly, as gas gun like that, with a heavy ass 20+ inch bull barrel becomes a joke.
and with a small shorter pencil like barrel, it will never be always super accurate.
larues have pretty decent design of a barrel nut there, i like those uppers very much, but even they are not truly precision guns. accurate enough for .223, yes, but not nearly in the area of mpa dasher rig.
but, what is decent for an ar is different from a 20lb rig, like below - larue is on the left, and i like it. and does it with cheap bullets, compared to bergers on the right.
still, it will never drill it like those 6 dahsers on the right, where if it deviates - it means i flinched it, and not the gun.
or like that - it is damn close, but, nope, never as consistent and never as repeatable as a heavy bolt gun.