The covert mod1 iwb holster is designed for any red dot on the market and has an open bottom that will fit your threaded barrels and compensators.Features a solid locking retention (audible and tactile "click" when securely holstered), extra tall sight channels to allow for tall suppressor sights and patent-pending hinge system conforms with the body during movements.Belt Size: 1.50-1.75"Color: BlackMaterial: KydexHand: RightFirearm Fit: FN 509Mount Type: Belt Clip