The SB47 Stabilizing Brace is essentially the AK-47 version of the well known SB15 AR Pistol Stabilizing Brace. It allows you add an “arm brace” that also happens to work well when shouldered to your AK pistol.
Echo Nine Three has been developing a sling plate for the SB47, the V3/SB, for some time now and it is nearing completion. They showed the most recent prototype on their Facebook page (pictured below). It will be made from steel like their other sling plates and Melonite processed for durability and corrosion resistance.