C&H Precision Weapons Optics Adapter Plate Fn 509/510/545 V4 Mil/leo Steel Holosun 509T. Since all the mounting hardware is replaceable if any mounting hardware is damaged it can be replaced without replacing the entire plate. Mounting screws included. Specifications for C&H Precision Weapons Optics Adapter Plate Fn 509/510/545 V4 Mil/leo: Manufacturer: C&H Precision Weapons Color: Black Gun Model: FN 510 FN 545 FN 509 Gun Make: FN Herstal Gun Type: Pistol Package Contents: C&H Precision Weapons Optics Adapter Plate Fn 509/510/545 V4 Mil/leo What firearm models does the manufacturer say C&H Precision Weapons Optics Adapter Plate Fn 509/510/545 V4 Mil/leo is compatible with? The manufacturer suggests that C&H Precision Weapons Optics Adapter Plate Fn 509/510/545 V4 Mil/leo is compatible with FN 509 FN 545 FN 510C&H Precision Weapons FN509-509T-ST: Optics Adapter Plate Fn 509/510/545 V4 Mil/leo Steel Holosun 509T