FN 509 sights & optics

Here you find the accessories and upgrades we have for sighting on the FN 509: optic plates and red dot mounts that put a red dot on your FN 509. Everything on this page is made for the FN 509, so you only need to pick the right group for your pistol.

Putting a red dot on your FN 509

• Optic plate: for a slide with a factory optic cut closed with a cover plate. The plate goes into the cut and takes the red dot. We have plates for the Shield RMSc footprints. See Optics ready plates for FN 509 OR.
• Red dot mount: carries the red dot on a FN 509 without an optic cut. We have mounts for the Trijicon RMR, Docter and C-More RTS footprints, made by Outer Impact. See Red dot mounts for FN 509.

A plate fits only a slide with the optic cut, and a mount is for a FN 509 without it.

Choosing a plate or mount by footprint

Every plate and mount takes one footprint or a group of footprints. Find the footprint of your red dot in its specifications and take the plate or mount that names it.

Frequently asked questions

Which red dot fits a FN 509?

Red dots with the Trijicon RMR, Shield RMSc, Docter and C-More RTS footprints, on the plate or mount for your pistol.

Can I install a plate at home?

Yes. A plate needs no gunsmith and no milling: remove the cover plate from the optic cut, screw the plate in and the red dot onto it. Put a drop of threadlocker on every screw.