Maximus

I couldn't find the "Slings on Doubles" thread, however
this is my view.

Sling studs fitted but carry the sling in your pack or bumbag.
At least you have the option if ever you need to use a sling.

Also, having a sling with you, if you ever get into a dicey situation where you have to carry someone, being able to sling the rifle makes a hell of a difference.

And if all else fails, slings always makes good tourniquets !!!