I have a sling like this and my gun has the A2 NON collapsible stock
Sorry but the bungee cord slings are mall ninja and operationally bad to boot.
If you were to ever run a carbine course with transitions to pistol, the boing-boing sling will womp your nutsack and your muzzle might actually hit the ground while transitioning to kneeling.
Set it aside and “buy once cry once” to get the Magpul sling so your rifle rides up high & tight on your chest.
IIRC, the Magpul sling comes with an A2 buttstock capture.
guys thank you for the info
looks like I will be switching from single point sling to the 2 point mount don't need the bag being hit and looks like 2 point offers more control as well