They stay in the position you put your QD swivel in and don't spin around. I had the rotating type and changed them out. Sometimes the rear swivel would spin around and twist the sling up when you go from a "carry" position to shouldering it. The rear mount and swivel are also pretty close to your face when you have the proper cheek weld, you want it to stay either with the sling straight back or slightly canted down in the rear.
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