Apex Optic Mount for FN MRD Pistols to mount RMR Footprint Optics

The Apex Optic Mount for FN MRD Pistols is built to do one thing: let you mount a reliable RMR-footprint optic directly onto your FN factory slide. At $70, it’s a straight-up solution for shooters who want a secure mount without the extra hassle or extra parts. No need to hunt down a special key insert or fiddle with liquid thread locker — the pre-applied high-temperature thread locking patch on the screws means you can install it and get back to the range.

Designed for FN MRD slides — this mount works specifically with the FN Low Profile Optics Mounting System™ found on pistols like the FN 545 and other MRD-cut FN slides. It replaces the factory cover plate and gives you a solid platform for any optic that uses the RMR footprint, including Trijicon RMR, Holosun 407C/507C/508T, and similar models. No adapter plates, no extra shims — just a direct bolt-on fit.

• Direct slide mount — bolts right to the factory MRD cut on your FN pistol. No need for an MRD Key Insert or any other adapter.
• Pre-applied thread locking patch — the included screws come with a high-temperature thread locker already on them. That means zero mess, no waiting for liquid thread locker to cure, and a secure hold that stays tight under recoil.
• RMR footprint compatibility — built for RMR-pattern optics. You get a stable, repeatable mounting surface that keeps your zero where it should be.
• No-nonsense installation — takes a few minutes with basic tools. Remove the factory plate, drop the mount in place, torque the screws, and mount your optic.
• Solid construction — machined from quality materials to handle the recoil of full-size and compact FN pistols. No flex, no shifting.

Fitment specs: This mount is designed for FN MRD pistols using the FN Low Profile Optics Mounting System™. Confirmed fit on FN 509 MRD, FN 545, FN 510, and other FN slides with the same optic cut. If your FN slide has the factory MRD pattern, this mount is what you need to switch to an RMR-footprint optic. The mount itself is low-profile, keeping your optic close to the bore axis for a natural sight picture.

Who it’s for: This is for the shooter who wants a practical, affordable way to run a red dot on their FN pistol. No gimmicks, no extra steps, no overpriced adapter plates