Just have Precision Firearms do the upper builds for you.
That guy does shit work and is an ass. My opinion is from 1 hand experience back around 2012. Hard pass.
All make top notch barrels.
Back to the original question no and I've used a wide assortment from mega arms monolithic to cheap Andersons. My favorite these days is Aero Precision.
I always use full length buffers in my precision builds and adjustable gas blocks.
The barrel is the deciding component and I've owned several 1/2 and 3/4 moa ar15 and ar10's.