The Universal Wire Loop attaches a firearm sling to an AK, M4, M16, SIG, SCAR, a buttstock, or an eyelet - it will attach to almost any rifle - even an M240B machine gun.
www.blueforcegear.com
Alternatively, there's also the Proctor Sling that you could secure over the handguard and probably hold in place with some 100 mph tape.
Easy peazey. Just did this for my RPR Rimfire a week or two ago. Ordered a cheap sling from eBay that had plastic buckles and that was it.
QUOTE="rth1800, post: 7866430, member: 28909"]
Does anyone know of a loop type nylon sling. One that just loops over barrel and stock without attachments? This for a CAR 15