A bit gucci but works really well, especially with kp-15 lowers! - Reptilia Socket Mount M-LOK QD Sling Attachment Point

As far as QD mounts go for slings this is one of my favorites even though it is a bit pricey. When mounted on the front of my hand guard I really like how the QD on the sling is directed rearward rather than out at a 90 degree angle. It feels like there is less stress on the QD. It is also much less of a snag point.
Even better, if you have a KE Arms KP-15 lower that uses an m-lok sling adapter on the stock this works amazingly well for the of the same reasons. As a matter of fact it is probably more useful on the KP-15 stock than on the hand guard because it makes the sling attachment so much more streamlined. In fact I am purchasing more for my other KP-15 lowers.