What is the primary use for the weapon Tintman?
I don't like a 3 point sling on a weapon that isn't for, say, room clearing or serious field work. It's just overkill and more money spent on something you don't really need.
Now, if you just want a sling to wrap into when shooting and be able to sling the weapon during a walk in the woods with the dog, I agree with Deth502. A basic, 2-point sling with a good shoulder pad to ease the ride pressure is a fine choice for the application.