16" middy upper A2 profile barrel, no BCG no CH for $279.99. Link
Standard lower build kit, milspec buffer tube and stock for $79.99. Link
Forged charging handle for $14.99. Link
You missed the blemished lower sale, but their standard lowers are $99.95, Link, or wait for the blems to come back in stock.
Add BCG and you're done.
JSE has the M16 BCGs in stock for $110 right now. They don't last long though. Link and Link
Should be able to do that for under $600 shipped and transferred.