www.deztacticalarms.com
These guys have some uppers.
I've used their barrels before and have no complaints.
They even have a 16" barreled 5,56 with a front sight tower and a pencil barrel profile and it's in stock.
Brownells shows this one in stock
https://www.brownells.com/rifle-par...=Avantlink&utm_content=NA&utm_campaign=Itwine