Bravo Company's BCMGUNFIGHTER Picatinny Rail Quick Detachable Sling Mount fits standard 1913 Picatinny Rail interfaces. Accepts standard QD (quick detachable) push button sling swivels (not included) and has a non-rotational locking interface.Requires two lugs and one 1913 slot to mount properlyAll steel constructionIncludes hex wrench