Nuprols single point rifle sling. This sling attaches to your rifle with a metal clip at the base which also has a quick detach clip

Single point rifle sling.
Attaches to rifle via a metal clip which also has a QD clip from the sling should you want to detach the rifle from yourself in a hurry.

A quick detach clip on either side of the sling also enables you to quickly release the rifle and sling from yourself in an emergency.