do your own research, the reports are out there. Or make friends with some people that have the first hand experiences, instructors, or those of the liking. You are the one not providing any evidence. Just because you, whoever you may be and with whatever experience or lack thereof you may have, haven't seen it, doesn't make it real or unreal. Just don't get so upset when you do discover that your beloved DPMS that you may put 100 rounds thru a year may not be up to par with some of the other options out there....or perhaps you already know that and you like many others are just emotionally driven to argue and dismiss the truth in an effort to justify whatever it is you're trying to justify.
Sounds like the response of a person grasping at straws. I don't own a DPMS rifle, but know about 5 shooters who do. They have no problems, and run thousands of rounds every few months through them. I have a Bushmaster from the ban era (that has been rebarrelled and restocked once the ban ended). It has seen at its worst about 3600 rounds in a week, and has not hiccuped in the 11 years I've had it. I have seen Colts lock up to the point that they go home in two pieces. In that example, I fired the rest of the Wolf rounds through mine with no problems. His jammed about 6 times per mag on it.
Again, the burden of proof is on the accuser. I really think you have nothing here, or you would show it. Sorry, but "do your own research" doesn't get you out of it, nor does a personal attack. Both are signs of someone backed into a corner, being forced to use distractions to mask the fact they can't continue the argument.
Nothing is wrong with peace-of-mind, but it is not necessary for everyone. Most people, as supported by ATF domestic production statistics, do not buy the mil-spec rifles. It may be as much as 5:1 non-spec to milspec. Apparently, most do not feel it necessary to pay $300-400 more for mlspec, just as most people will not waste $800 to buy new tires for their used car for no reason.
I have no emotional investment in this, only a 'want' to tell the truth to people that seek advice. Thousands of RRA, Bushmaster, Armalite, etc. rifles go through rigorous courses every year with no problems. Thousands of non-spec bolts survive year-after-year, as do thousands of 4140 and SS barrels. In this particular thread, we have a poster who has had no trouble with their DPMS rifle, but has caved to the irrational, emotional fear and paranoia behind milspec. Now, this poster is going to waste good money on "upgrades" that will likely make no difference. There goes a case of practice ammo that could be used to train with their equipment.