Obviously, passionate feelings abound about AR “tiers”.
I would like to point out, that as a lot of companies do, PSA has lots of different levels of “quality” in their line.
They still occasionally have the CHF FN barreled kits and uppers (have 2 older ones myself) and some of their barrel steel is 4150 CMV, depends on the particular barrel. Their premium BCG is MPI Carpenter 158 and I have owned and helped others with many of them and have always seen that they come properly staked and assembled. They use mil spec tubes and forged receivers and many other attributes named here as the reasons to buy Colt.
I am sure some people have had a turd arrive, when you grew like they did in such a short period there are bound to be some issues that slip through the cracks. I myself have only had one issue, a canted front sight, and it was resolved in a week.
You cannot look at their Ptac or Freedom line and declare the whole line as “hobbyist”. They produce a premium line that is quite good at a price that has helped put tons of rifles into the hands of folks who otherwise would have taken up another interest.
The owner has stated that his goal is to arm as many folks as possible by making affordable ARs. That and the experience I have had myself make me always look to them when making a purchase or recommendation.
Also, the term “mil-spec” simply means it meets the quality of the bean counters in the government. The military has been straddled with a lot of “mil-spec” things that were not up to the task they were purchased for.