The C&H Precision FN 509 Optic Mount Plate provides seamless conversion for FN 509/510/545 optic-ready pistols to mount popular red dot sights. Precision machined from 6061 aluminum with an anodized finish for durability.C&H Precision FN 509 Optic Adapter Plate (SKU: FN509-RSH)Compatible with Trijicon RMR/SRO/RCR red dot sightsFits Holosun 507C/407C/508C/508T/507 Comp opticsWorks with C&H EDC-XL/COMP red dotsPrecision CNC machined 6061 aluminum constructionIncludes stainless steel mounting hardwareMade in USA with rigorous quality controlEssential for FN pistol owners looking to mount aftermarket optics this adapter plate ensures secure reliable mounting while maintaining proper sight alignment and functionality.