Why don't more people use three points? In addition to three point use, mine can function identically to a two point, and similarly to a single point. Its the best of all three worlds.
The advantages of a three point sling were negated with quality two points like the Vickers/VTAC,IMO. The three point had that stupid strap running down the side of the weapon that screws with your controls somthing awful on ARs/pump shotties. 3 points make it almost impossible to transition to the support side shoulder, and are usually a biatch to get into/ out of.