Not exactly a Daniel Defense, but I’ve shot lots of rounds through the ‘low-end’ ARs, and they have done fine.
Now you’ve spent less than $400 and have a functional Citizen’s Rifle…


Then figure out your sight options…(my preferences below)
…and the sights WILL cost more than the above parts…!
At least slings aren’t too expensive…

Now in reality I DO tend to upgrade charging handles, install adjustable gas blocks, and do-on, but I’m not convinced the brand of lower is critical, nor the upper. An upgraded bolt carrier is not expensive, nor a barrel, if so inclined.
But for those who just want a gun that will fire reliably and hit the target, my experience with the less expensive firearms so far suggests that they do the basic job pretty well. I’m sure if a person was firing as fast as they could, and dropping the firearm in mud and giving it the sort of abuse the military does, some manufacturers might survive a lot better than the low-end ones, but when it comes to firing a few dozen or even a few hundred rounds pretty quickly, I’ve never had a problem. I am more interested in the ability to deal with a pack of dogs, or if necessary, some kind of two legged, predator incident, but don’t really anticipate trying to hold off an army.