The rule for ARs is that there are only a few manufacturers of lowers, uppers etc......most others stamp their name on them and/or do mild variations to the parts aesthetically.
Same goes for barrel. Due to the demand and popularity of the AR, many have undertaken making barrels buying the blanks from reputable companies, but most of the time the quality isn't there I'm afraid.
For example, I bought a Rainier Arms barrel. They are popular and the company is huge. Well my 10.5" barrel was not ported properly for it's length.
I took to one of our local gunsmith with a very good reputation, and first thing he says to me is that he just worked on 2 other barrels from them recently that were faulty.
Now, this does not mean all their barrels are crap, but you are opening yourself to the possibility.
One of my first AR build is still sporting the same barrel, it will chamber even bulk MFS soft point with no FTF or FTE and I have thousands of rounds through it. Its a White Oak Armament.
I have built several ARs for myself and for friends and from experience those who spent the $ to get the good stuff haven't had a single issue. You get what you pay for I'm afraid.
Again this is my opinion based on my experience.
If you are just planning on dumping rounds for fun down range at 15-20 yards then by all means buy one of those.
The barrel is the most important unit of any rifle.
Alberta tactical use Lilja blanks and makes great barrels.
Faxon firearms makes great barrels too buy via CTCSupplies:
https://ctcsupplies.ca/products/faxon-firearms-flame-fluted-ar-15-5-56-nato-barrel-qpq-20
Dominion Arms:
https://www.canadaammo.com/product/detail/dominion-arms-da-556-20-barrel/