"I give the sling 5 stars because of it's quality and ease of use 9once your figure out how to attack it to your gun). It's built to high quality & the plastic pieces are very durable and sturdy. This sling can also be used as a 2-point if you have the straps that wrap around you loose enough as to come together if you pulled them both together. I wear mine a little tighter so I would have to adjust the one "buckle"(if that's what you'd call it") to give me that slack to pull it to a 2-point. No big.
As others have said, it did not come with any instructions, but just look up your gun with a 3 point sling attached to it & figure it out. There were a few extra pieces I removed from the sling & didn't end up using with my M16a4, but I'm sure it just depends on your gun model."