Desantis Slim-Tuk Holster for FN 509 Tactical (Ambidextrous) The Slim-Tuk® is a new minimal ambidextrous IWB holster fashioned from Kydex® sheet. One of the most unique features about this IWB holster is that it uses our tuck-able 360® C-Clip, which affords the wearer unlimited mounting options. The hardware can easily be reversed to change from right to left hand. The Slim-Tuk® is precision molded and has adjustable tension and a rugged 1.75" nylon clip. Fits: FN 509; 509 TACTICAL WITH OR WITHOUT REFLEX SIGHTS