When I started looking for parts for my budget build, I had a hard time finding non-pistol, non-top tier HBAR barrels.
Delta Team Tactical has a 16" HBAR 1:7 barrel, although you get the joy of DTT shipping/processing times (and no one answering the phone and email reply being a week or two later).
I expect it to be delivered today, so I can post up pics/info, if desired.
Edit: just searched the DTT site, and they also list some built uppers, not just the one barrel.
I recently completed a parts AR (5.56). I sourced my barrel and BCG from Delta Team Tactical at a really good price. I wanted to see how cheap I could build one. I already had a DPMS stripped upper (slick side) but bought everything else. I came in at around $400 once I paid a smith to install the barrel. Shoots great so far. However I have upgraded a lot now.
That being said, I have no issues with DTT products so far. I plan on getting a a complete upper from them for my pistol build.