Some of the content of the "my brand is better than your brand" threads is even more absurd than the old Mopar/Chevy/Ford arguments from my high school days or the "if it ain't Harley Davidson it ain't shit" silliness of my later years . Much of it is simply "my way or the highway" type of thinking and is said, not out of any real knowledge, but just to justify a purchase decision or to diss someone else's decision.
The QC argument, IMHO, only mostly a moot point for people who buy guns one or two at a time. How many of us civvies will buy an AR and leave it unfired and untested until a SHTF scenario happens? Answer is, we won't. We'll fire it, fix what's wrong (if anything), tweak it and tune it until we're sure it runs 100% before we rely on it. In other words, people like us do our own quality control and at that point it's as reliable, if not more so than a manufacturer that individually inspects every rifle. Personally, I trust my own QC more than that of some unknown company employee.
As far as 4140 vs. 4150 vs. chrome lined vs. non chrome lined. I've done the research and made up my own mind. I suggest that anyone who has questions do the same. Take into account whether you'll be firing semi-auto vs. full auto and if you plan on cleaning and maintaining your rifle regularly. If you still feel you need chrome lining or 4150 steel then by all means get it, it's your money, but leave the rest of us alone cause we're sick of hearing it.
If you want a certain brand name rifle then buy that brand and be happy. But if you have to put the rest of us down because we didn't buy the same brand in order to justify your purchase decision, then maybe you need to do a little soul searching. Look in a mirror before you diss someone else for their decision. I'm not aiming this at any one in particular, just a general rant about some of the total BS I read on this board.