Here are some pics of the Troy Industries low profile QD sling mount. I don't know that I'd call it low profile but it takes up very little rail space and it's solid.
http://home.centurytel.net/flanneldr...d-mount-01.jpg
http://home.centurytel.net/flanneldr...d-mount-02.jpg
http://home.centurytel.net/flanneldr...d-mount-03.jpg
http://home.centurytel.net/flanneldr...d-mount-04.jpg
http://home.centurytel.net/flanneldr...d-mount-05.jpg
http://home.centurytel.net/flanneldr...d-mount-06.jpg

