I agree with you on the Oly. But I wonted a 20" SS barrel and Bushmaster did not offer one in 6.8. Also for what it's worth, I got this upper at the right price.( Maybe) Even if I need to send it back for repairs. My problem is, sense it's different manufactures and I don't won't to get into the "he said, she said". Right now I don't know if it's a upper or lower problem. Or the thorough cleaning solved the problem.
As for as the firing pin sticking, I never thought of that. Like I said it did not double fire the last time I was at the range. However, I really cleaned it well before I went.
Does any one think the buffer and spring could be the problem? If not, I would like to put the Magpul collapsable stock back on. Maybe I should leave it along for a few more trips to the range. I don't think I will load more that 4 or 5 rounds in my mag at a time.
As for any thing else that I did not mention. Other than in the .223/5.56 mode it occusionally jams by trying to load two rounds at the same time. I think that's the Winchester 5.56 ammo or the mag. However, I changed to a .223 ammo and so far have not had a problem. Other than that the AR is sweet.