I would advise switching to the static, classic crosshair. That way it's easier to remember (for me anyway) that the crosshair only marks the center of the screen, after that it's up to you to control the recoil by learning how much to pull the mouse down for each shot after the first. Every gun is different so it helps to stick with one or two on each side until you get the hang of them. I would recommend the cheaper (famas, galil) and more expensive (ak, m4) ARs as the ones to really get to know.