Recommend a 6mm ARC upper??

[1wildcatfan]

Who makes a good 6mm ARC upper?

 

[Hoss50]

The best part about ARs is building them. Uppers are easy, find a nice barrel and some associated parts and build exactly what you want, not settle for something someone else builds.

 

[jtweten]

Atheris
I love mine. Good guys to work with.

 

[Pdog11]

Mitchell defense

 

[levers4life]

Build your own. I'm running a 22" Craddock Precision stainless match barrel on an Aero upper. I've been very pleased with it.