I have a sling that was made to work. It had snap swivels on both ends, so i cut one off. Then I used the G36 sling loop that attaches to the back peice where you have the small silver loop and put it through the sling before I atteached it to the gun. It worked well, but if I wasnt a lefty. Eventually used a different rig that works better for me. Here is a link off Redwolf to the sling loop
http://redwolfairsoft.com/redwolf/ai...l_for_G36C.htm