C&H Precision Weapons Optics Adapter Plate Fn 509/510/545 V4 Mil/leo Aluminum Holosun 407K/507K. 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-HOLOK: Optics Adapter Plate Fn 509/510/545 V4 Mil/leo Aluminum Holosun 407K/507K