My wife just bought a MP15-22 pistol and I am looking to outfit it. I would like to add a sling but not sure the hole in the shoulder stock would be the best place for a sling attachment. Is there another place attach a sling? I am looking for less than a carry method but a way to use a sling to help stabilize the pistol during firing while standing. I was thinking of creating an attachment point to the handguard