In my regular looking for gun deals, I came across a couple things:

Spikes 11.5 CHF

These are made by FN, I've got a couple FN CHF barrels and they are awesome.

https://www.opticsplanet.com/spikes-tactical-cold-hammer-forged-barrel-w-fsp.html

Rosco 11.5

https://www.opticsplanet.com/rosco-...-finish-1-7-twist-1-2x28-4150-cmv-b.html

Also, a del-ton (cheap but solid IME) complete (bcg and ch) 11.5 upper

https://www.opticsplanet.com/del-ton-pre-ban-flat-top-barrel-assembly.html


Good luck with your build