I've been thinking about building an AR10. I know my LGS has a Noveske upper / lower in stock ...Mega.....
What are the big watchouts or decisions one must make? Robert the Texan and others have built their own here. I'm just in research mode

What barrel do you go for?
What mfg make good barrels ?
Adjustable gas blocks for AR10's?
What rail or who makes AR10 rails ?

PB