For Holoson – Apex Optic Mount Screw Set for FN MRD Pistols with an Apex mount for RMR Footprint Optics

Description

This screw set is the specific solution for mounting Holosun optics to FN MRD pistols using an Apex mounting plate designed for the RMR footprint. At twenty dollars, it eliminates the guesswork of finding the correct thread pitch and length for a secure, zero-holding installation.

The set includes all necessary screws for attaching the Apex mount to your FN slide and for securing your Holosun optic to that mount. Each screw is precisely machined to match the factory specifications required by both the FN MRD slide cuts and the Apex plate. This prevents over-torquing, stripped threads, or an optic that shifts under recoil—common problems when using generic hardware.

Key specifications and fitment details:

• Designed specifically for FN MRD (Micro Red Dot) pistols, including the FN 509 series and FN Reflex MRD models that use the Apex mounting system.
• Compatible with Holosun optics that use the RMR footprint, such as the 507C, 407C, 508T, and 509T (when using the appropriate RMR adapter plate).
• Intended for use with the Apex RMR Footprint Optic Mount for FN MRD pistols.
• Includes screws for mounting the Apex plate to the FN slide, plus screws for mounting the Holosun optic to the Apex plate.
• Constructed from high-strength steel to handle the cyclic stress of competition shooting and duty use.

Why this matters for your build:

• Competition shooters: Eliminates a variable that can cause a zero shift between stages. The correct screw engagement keeps your dot on target through fast transitions and reloads.
• Duty and serious use: A loose optic is a liability. This set provides the correct thread engagement for the Apex mount, ensuring your sight stays fixed under hard use, holster wear, and repeated firing.
• Upgrade builders: If you are converting your FN MRD pistol to accept a Holosun RMR-footprint optic, this screw set completes the installation. It removes the frustration of sorting through a parts bin for the right hardware.

This is a direct-fit hardware kit for a specific combination: FN MRD slide, Apex mount, and Holosun optic. It is not a universal set. Verify your slide is an FN MRD model and that you have the Apex RMR Footprint mount before purchase. The screws are sized to the exact depth and thread count required by that mount, giving you a solid, repeatable installation without modification.