Magpul ASAP Ambidextrous Sling Attachment Point
The Magpul ASAP is one of those little gadgets a veteran operator should not have to live without. Allowing ambidextrous sling placement and a 180 degree range of motion the ASAP is just as useful for left or right handed operators. It is made from extremely durable precision cast black manganese phosphatized steel, allowing this small device to lift up to 300 pounds without breaking.
It replaces the AR15/M16 typical carbine stock receiver end plate, which allows minimizing snagging. It also allows easy change from weapon and reaction side shoulders.
If you want to adjust a single-point type sling with snag hook style attachments like the Magpul MS2 onto your AR15/M16 rifle, then the Magpul ASAP is exactly what you are looking for.