Receivers for Top Tier barrels

[DVDVC]

If I wanted a billet upper receiver, I’d get a mega. $200 and although it’s tight it’s not a PIA to install the barrel. But personally, I don’t see a need for a billet. My forged receivers work every bit as well.
I’ve experimented with it. My shooting buddy has a mega with the same exact Bartlein barrel as mine. No difference whatsoever an accuracy.There are pros and cons to billet vs forged.Personally I‘d buy the forged and put the extra money towards the barrel.

Please elaborate on the pros and cons of a billet receiver.