Ar style pistol stabilizing brace - SB Tactical SB15 Stabilizing Brace for AR Pistol Buffer Tube Platform

While these are the original style and a bit larger than some of the newer styles, these are still a great deal at this price, and work great, and with the ATF changing the laws so that you may periodically shoulder theses stabilizing braces without worrying about going to jail ( at least in SC the laws in your state might very on this.) They make a great accsesory to any pistol with a buffer tube.