I knew something about this list was off and reeked of fanboy bias. This is the same bullshit listing that was posted over at AR15. com back in 2013 or so.
http://www.ar15.com/forums/t_1_5/1446406_AR_Manufacturer_Tier_Quality_Ranking.html
With that out of the way this list has been picked apart in countless ways, over the past 2 years. The most glaring fail of this list, is the lack of ranking criteria. What makes "Tier 1" Larue a better rifle that let's say a "Tier 2" Noveske ? As far as Mega being "Tier 4", Mega Arms doesn't even market a turnkey rifle.
I agree. I had to sell off my AR when I went to school in DC and claimed residence there, but (and I'm a little rusty on my AR knowledge), there's a lot of questionable orders in this list.