They might be great if your going to shoot your rifle in a mounted state. I mean everybody holds a rifle different!! Some cant it one way and some others. The best way is for you to hold your rifle and move the crosshair until you think they are the way you want it,not a mechnical device. You do want the gun to fit you in all ways not what someone else says or thinks. Its your gun remember that,and your the one going to shoot it. vangunsmith