Re: Experience/ review with White Oak uppers
You wont go wrong with White Oak.
When moving from a M1A to AR service rifle I inquired all over as to which was the best, most accurate. Almost all of the higher caliber high power shooters I talked to recommended White Oak. I went that route and have no regrets.
As a side benifit, you wont find any better service then you get from White Oak.
At first I was having ejecting problems, though it was my reloads, went to Military Ball, same issue. A quick e-mail explaining the problem and John expressed me another bolt (no charge). I haven't had one issue since, not one malfunction.
If I had to replace my AR for some reason, or was to buy another, I wouldn't consider anyone else.