How do I build a Belt Fed Upper Receiver NON 5.56

[bunkerguy]

I want some advice, what to do what not to do, any website or cds i should get, any and all help would be great.

[Iraqgunz]

Here's a thought. You are posting weird off the wall stuff. Gas operated .50 and now belt fed uppers?

Thin+Ice= You skating on it.