Apex Optic Mount for ACRO/MPS* – FN MRD

Description

For FN 509 series pistols equipped with the FN Low Profile Optics Mounting System™, the Apex Optic Mount provides a direct, secure mounting solution for ACRO-pattern optics. Priced at $60, this mount eliminates the need for stacking plates or additional MRD inserts, giving you a cleaner, more reliable setup for practical shooting, hunting, or daily concealed carry.

Machined from a solid billet of steel and finished with a black oxide coating, this mount is built to handle the recoil of regular range sessions and the demands of field use. The integrated locking key interfaces directly with the factory slide on your FN 509, FN 545, or other FN MRD-compatible pistol. That means no extra parts to lose, no complicated shimming, and a lower overall height for your optic.

Key benefits for your setup:

• Direct-fit installation: Mounts straight to the FN Low Profile Optics Mounting System™ without needing an MRD insert. This reduces the number of parts between your optic and slide, improving stability and consistency.
• Steel construction: Billet steel with black oxide finish resists corrosion and holds zero under heavy use. It’s a tough, long-term solution for shooters who put their gear through real training.
• No stacking plates: By eliminating the extra plate stack, you get a lower optic profile that co-witnesses better with standard-height iron sights and reduces the chance of snagging on holsters or gear.
• Broad optic compatibility: Accepts the Aimpoint® Acro™ P-1 and P-2, Steiner MPS, Lead & Steel Pandora PB-3, and any other optic using the ACRO footprint. This gives you flexibility to swap between optics without changing the mount.

Specs and fitment notes:

• Compatible with: FN 509 series pistols using the FN Low Profile Optics Mounting System™, including the FN 545 (check your slide’s mounting interface).
• Material: Billet steel, black oxide finish.
• Installation: Direct slide mount – no MRD insert required. Use standard torque specs for your optic.
• For MPS users: We strongly recommend pairing this mount with the Apex Super Clamp to expand the clamping range of your Steiner MPS optic for a more secure fit.

Whether you’re setting up a competition gun, a hunting sidearm, or a defensive carry pistol, the