What elseis needed to complete this rifle?

[ARINGA]

If I purchase the complete lower below, what else is needed? I did not see any complete uppers at BRO's site so what brand uppers can I go with? I apologize for being a NEWB.

[blue109]

I'd assume most DPMS pattern uppers will work. I'd stick to the more well known brands and Google around before you commit to be sure. 

 

You are always better off buying a matching set.  Any interest in diving in and assembling the upper? Really only takes 2 extra tools and you get to build it exactly how you want it.