I couldn't agree more with your synopsis on round count. On an AR, if you are a couple to three hundred rounds in and have had no issues, then you are almost always good to go. I have seen a few exceptions though. My best friend since college bought his son an M&P 15 for his 25th birthday and after 900+ rounds of flawless fire, it suddenly has developed a very weak ejection problem. We tried all of the normal things you would try and nothing changed it so he called Smith and it's on it's way back to them for them to look at. I can't wait to hear what the problem is cause it's like the damn thing is haunted. Nothing else is wrong! That kind shit gets very frustrating. Anyway, thanks for the comments guys.