DeSantis Slim-Tuk IWB Kydex Holsters F/N FN 509 509 Tactical w/ or w/o Reflex Sight Ambidextrous Kydex Black 137KJ5PZ0 137KJ5PZ0. One of the most unique features about this IWB holster is that it uses our tuck-able 360 C-Clip which affords the wearer...