Forgive my ignorance but what is the difference between 6061 and 7075?
I don’t know and I don’t care.
All I know is that I have 4 NEA AR15s and all have WELL in excess of 10k round count and the uppers haven’t worn out.
I think you get bogged down in theory while ignoring the practical.

Hey now, don't let a complete lack of knowledge on the subject stop you from joining the conversation. It has never stopped anyone else on CGN before.

I though this thread would have informative details about each gun but all I read was dudes arguing about aluminum, nice.
They now have pictures up of the anodized production run model...
https://www.instagram.com/blackcreeklaboratories/
You've got an MDI set don't you? Did they change the mag well?
Meeen what a joke ahah
It's works !! I don't know why engineer of DD, Colt and other use 7075, 6061 works but i don't know why !! And you compare car body and AR ahah com'n
No i'm not a student, and number of post on CGN is not a diploma dude![]()
What-specifically- do you feel will be a problem with an upper made from 6061?
What-specifically- do you feel will be a problem with an upper made from 6061?
It will corrode if you take it to the Vietnam jungle!




























