I've been considering using a single "Button Sling" from the Web site below.... I did a search of the forum for Button Slings and found nothing... If you have any experence with these slings, please share your experence.... I have a Colt Upper on a Cavalry Arms lower. The Cav Arms lower does not lend it's self to a single point type sling, except when using the read take-down pin. Thanks, Helopilot.