So...... I was able to post this on the Ar part, not sure why, so it is going here. What is the hype over flat top Ar15's? What advantages does it give the user? Compared to an A2 upper or a flattop, which is better, and why. Please give me some good information to go on. Part of me wants to change out my A2 upper to a flat top because well "All the cool guys are doing it," yet part of me likes how the A2 is (though that could be because that's all I know). Thanks.