Rival Arms uses a coalition of machinists and designers and coaters to provide you with the highest quality products possible. Quick-detach sling swivels are quickly becoming the world's most preferred way to attach slings to rifles and if you want to go this route but do not have a QD sling socket on the forend of your firearm this product is just for you. It mounts to standard M-LOK slots and includes both a QD sling swivel as well as the mount/socket necessary to attach it to the rifle.