I looked around for awhile and couldnt find the answer so... Like many of you I have installed a collapisble stock on my now noban AR.  I did my best to give it the retro XM177E2 look.  I had it rebareled with a Bushmaster 11.5" upper with CAR flash hider.  As for the stock I put an old style FN 4 position stock.  Now my question, what sling do i use with this setup and how do i put it on?  The only way to attach a sling to the buttstock is through those two slits.  I just cant seem to find a good way to put it on.  The sling I am using is an original M16 sling that my buddy got from the Marine base.  Thanks for any help.