Description
Living on the coast means dealing with salt air, humidity, and sweat that can destroy lesser firearm components. The Apex Optic Mount for ACRO/MPS on FN MRD pistols is built for that environment. Machined from a solid billet of steel with a black oxide finish, this mount resists corrosion while providing a rock-solid foundation for your optic. At $60, it’s a direct investment in reliability for your FN 509 or FN 545.
This mount is designed specifically for the FN Low Profile Optics Mounting System™. It replaces the need for a separate MRD insert and eliminates the common problem of stacking plates. The integrated locking key mounts directly to your factory FN slide — no extra parts, no guesswork, no wobble. You get a lower, more secure fit that keeps your optic close to the bore axis for faster target acquisition.
Compatible optics include:
- Aimpoint® Acro™ P-1 & P-2
- Steiner MPS
- Lead & Steel Pandora PB-3
- Any optic with an “ACRO” footprint
Key benefits for your EDC:
- Corrosion-resistant steel construction — holds up to Florida’s coastal humidity and daily carry sweat.
- No stacking plates — mounts directly to the slide for a streamlined, snag-free profile.
- Integrated locking key — no loose inserts to lose or break during field stripping.
- Precision fitment — machined to tight tolerances so your optic stays zeroed shot after shot.
Fitment notes: This mount is specifically for FN 509 models with the FN Low Profile Optics Mounting System™. It also fits the FN 545. If you are running a Steiner MPS, we recommend pairing this mount with the Apex Super Clamp to expand the clamping range and ensure a secure grip on the optic body.
Whether you are on the range or carrying daily, this mount solves the common issues of loose fit and plate creep. Black oxide finish absorbs light, reducing glare and keeping your setup low-profile. No extra hardware needed — install it and run it.
For coastal shooters who trust their FN with their life, this is the mount that stays put.
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