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

About this product

Apex Optic Mount for FN MRD Pistols to mount RMR Footprint Optics by Apex Tactical. Fits Apex Tactical.

Ships to all 50 states. Available nationwide.

The Apex Optic Mount provides a direct, secure mounting solution for RMR footprint optics on select FN MRD pistols. Designed specifically for use with the FN Low Profile Optics Mounting System™, this mount interfaces directly with the factory slide cut — no additional MRD Key Insert or adapter plate is required. This keeps the optic mounted lower to the slide, which can aid in maintaining a consistent sight picture and allows for co-witnessing with standard-height iron sights on many setups.

Each mount includes precision-machined screws with a factory-applied High-Temperature Thread Locking patch. This pre-applied patch eliminates the need for liquid thread lockers, simplifying installation and reducing the risk of over-application or mess. The mount is constructed from steel for durability and designed to maintain zero under regular use. For California buyers, this mount is a straightforward path to adding a red dot to an FN pistol without modifying the firearm’s internal components or magazine capacity — fully compliant with state regulations.

Compatible models include:

• FN 545 Tactical (MRD slide models)
• FN 510 Tactical (MRD slide models)
• FN 509 series with MRD optic cut (including 509 Compact, 509 Mid, 509 Tactical, and 509 Midsize)
• FN Reflex MRD models
• FN FNX-45 Tactical (MRD slide models)

RMR footprint optics that fit this mount:

• Trijicon RMR (all generations)
• Holosun 407C, 407V, 507C, 507V, 508T, 509T (with appropriate adapter plate for 509T)
• Holosun EPS and EPS Carry (with RMR adapter plate)
• Sig Sauer Romeo1 Pro (with RMR footprint adapter)
• Leupold DeltaPoint Pro (with RMR adapter plate)

Specifications:

• Material: Steel, black oxide finish
• Height: Approximately 0.20 inches (measured from slide surface to base of optic)
• Weight: 0.3 oz
• Mounting type: Direct to FN MRD slide cut — no plate needed
• Includes: Mount, pre-applied thread-locking screws, installation instructions
• Made in the USA

Why this matters for California owners: This mount is a drop-in part that does not alter the firearm’s magazine capacity, threaded barrel status, or overall configuration — all critical factors for maintaining compliance with California’