there are a lot of existing threads on slings, attachment points, and a pictures thread full of photos. you should look around and search a little. what you are asking for is definitely here somewhere (probably 4-5x).
Here are a couple options for a standard off the shelf sling with QD sling swivels.
I have mine on the left side. The front sling swivel stud adapter on the picatinny rail is "in the white" to show up better.
Can't remember, think its midwest industries. Works well, comes in FDE, and is very similar to the way my PWS rifle's are set up with their proprietary buffer tube.