That is a fancy setup. They permit the use of both hands and leave the operator ready. Did you use one in the USMC?
No I did not. We used the old sling hooked up under the front sight and on the end of the butt. That one was good for walking to and from the armory but not very tactical.
I really like that set up with your sling. I went to Magpul and attempted to put the same outfit together. I'm just a tad rusty on this sort of thing. If you got some time could you list the parts needed for it. Totally new to the platform. I take it that a tool is needed to release the stock. I'm picking up my MP Sport next week.