I've always bought assembled uppers but wanted to build something cheap around a Larue barrel while they are on sale. I'll be available all day tomorrow and Saturday evening. Can pay, buy lunch, etc.

Anderson receiver
Larue barrel
SLR gas block
Unknown rail ( barrel nut looks like a  standard hexagonal nut around 1 1/8-1 1/4" so an adjustable wrench?)
A2 flash hider (I think. Going to get something here in a bit)
Plain mid length gas tube

I also have the  BCG so that we can check that too.

If you cant find anyone,
I'm bout 2 hrs away in Winchester, and I'd help you no charge.
Hopefully you find someone more convenient.

Message sent.