I currently use a fixed rear, and don't mind it, but I prefer a folding rear, folded.
At the ranges it would be an issue the Aimpoint can be used as a rear sight. In the very low odds of it going down that is. If I don't have time for that, odds are, i'm either going to pistol or may be totally screwed anyways.
Still prefer the scope be clear, even in a lower third, but in the end, it's personal preference.
"And Shepherds we shall be. For thee, my Lord for thee. Power hath descended forth from thy hand, that our feet may swiftly carry out thy command. So we shall flow a river forth to thee and teeming with souls shall it ever be. In nomine Patris, et fili, et Spiritus Sancti. Amen."