If the barrel is FN, it will say so. I'm not sure where PSA sources their other barrels, but they seem to be decent. I have two of their "freedom" stainless middy uppers and one .308 18" stainless; all have been reliable, and very respectable in the accuracy department. A couple of friends have had the PTAC phosphate uppers, and while they never equipped them with optics that would demonstrate the rifle's accuracy potential, they're able to hit what they're aiming at, and the rifles run just fine.
Having said all that, give this one some serious consideration:
http://palmettostatearmory.com/index...ng-handle.html
It isn't much more, melonite makes the barrel more durable, and I think you'll find the balance better with a pencil or LW barrel than gov't profile or heavy.
I have considered that one. Unsure as I have been reading up on the "melonite vs chrome" debate, and skeptical of the durability and "heat induced" inaccuracy of the pencil profiled barrels. Both would probably be a non-issue for a casual shooter such as myself, but I would like to have an "overbuilt" rifle for a "you never know" type scenario.
Probably been reading TOO much, lol. The options and variables to consider when building a "just right for me in my mind" AR is almost overwhelming, especially when cost is a factor.