Originally Posted by Chuck TX
It's because they're fine for plinking now and then, which is what most consumers do. How many lower tier owners have even possessed thousands of rounds, let alone shot it, or even plan to short of SHTF?
Not a lot.
It depends on intended use. I have friends with certain rifles and they think they're grand. I have owned said brand rifles and put enough thru them for the lack of quality to shine through. Mostly unusual & accelerated wear and busted LPK parts. They shoot a few rounds per year and will never know the difference.
The most prevalent rifles in the hands of the DOE guards defending places like the Riverbend Nuclear Power Plant and The Strategic Petroleum Reserve are DPMS. Bushmaster has a lot of their rifles being used as well.