I bought one of those new M4A1's in Milspec + brown, it's in the mail now should be here Wednesday. My first AR and I'm beyond excited at this point. Can anybody recommend flip up iron sights? I have it narrowed down to either Troy battle sights, Midwest Industries, or the GG&G spring loaded A2 sights. For the RIS II rail do I want the low profile ones or just the standard height... I think I'm gunna start a thread about it but if someone here has some experience with any of the above it would save having to do that.. thanks!