C&H Precision | FN509509TST | FN 509 to Holosun 509T

The C&H Precision adapter plate converts FN 509/510/545 slide cut patterns to accept a Holosun 509T optic. It is precision machined on HAAS CNC equipment and finished in matte black to match factory slides. The plate ships with mounting screws and is designed so damaged hardware can be replaced without replacing the entire plate.

Typical uses include mounting an optic for competition or range training and installing a duty-style optic for law-enforcement-style service rigs (where compatible). This plate is aimed at shooters who require rugged, repeatable optic mounting and prefer service-grade materials and fitment.

Product Specifications

• The manufacturer is C&H Precision.
• The manufacturer part number is FN509509TST.
• The product is an adapter plate with a fit for FN 509/510/F 545 slide patterns.
• The mount type is specified for Holosun 509T optics.
• The material is Steel.
• The finish is Matte in a black color.
• The color is listed as Black.
• The plate is classified under product type as a Mount.
• The subcategory is Optic Specific Mounts.
• Mounting screws are included with the plate.
• Mounting hardware is replaceable so damaged screws can be swapped without replacing the entire plate.
• The plates are precision machined on HAAS CNC machines and inspected before shipping.
• The plates are designed, manufactured, and shipped from a small family-owned business in Coastal Georgia.
• The product is intended for mounting optics and does not include the optic itself; the compatible optic is the Holosun 509T.
• The UPC is 616943735345.

This adapter plate provides a clean, serviceable interface between FN 509-series slides and a Holosun 509T optic, built for repeatability and field serviceability. Its steel construction and replaceable hardware make it a practical choice for shooters who prioritize durable mounting and straightforward maintenance.