I am the one who posted pictures of my single point sling attachment. I don't really know what you call the knot that I tied. I cut a piece of paracord, formed a loop, tied one end around one looped side, tied the other end around the other looped side and pulled on the ends of the loop so the knots slid together. Kind of like a double slip knot. I then cut a piece of heat shrink tubing just large enough to cover the knot. The tubing is only there to form two seperate loops on both ends of sling attachment and to hold the center section in place. The tubing as no structural integrity. You then take the grip off, slip one looped end over the grip stud and tighten the grip back down. The grip stud is what takes all the weight of the gun hanging from the sling. I cut a channel in the rubber of the top grip surface so the loop would sit flush with the receiver. If you don't then your grip is going to have a gap between the upper grip surface and the receiver.
Thehellbringer: Where do you live in CO? I am up in Longmont and shoot at Front Range in Loveland quite often. If you are ever in the area let me know and you can check it out first hand.
Hope this makes sense,
MadDog