Holosun 509PLT FNX45 509 Adapter for FNX 45 509PLT FNX45 UPC 810047071044
Product Description
The Holosun 509 Adapter Plate for FNX-45 Tactical (MPN: 509PLT-FNX45) is a precision-engineered steel optic mounting interface designed to adapt Holosun 509T series enclosed red dot sights to FN America FNX-45 Tactical factory optics-ready slides. Built specifically to bridge the unique slide cut geometry of the FNX-45 Tactical with Holosun's enclosed clamp-style footprint, this adapter plate delivers a seamless, low-profile mounting foundation.
Precision-machined from high-strength steel alloy, the 509PLT-FNX45 resists shearing forces under heavy .45 ACP slide reciprocation. The plate features a durable matte black finish that matches factory slide aesthetics while providing exceptional protection against holster wear, perspiration, and environmental moisture. Integrated recoil indexing lugs align perfectly with the FNX-45 slide pocket, transferring recoil energy away from the mounting screws to guarantee zero shift and long-term optic stability.
Designed for straightforward drop-in installation, the Holosun 509PLT-FNX45 mounts directly into the FNX-45 Tactical slide optics footprint using standard slide screws, providing a rigid cross-bar dovetail platform for clamping down your Holosun HE509T or HE509-RD red dot sight. It serves as an essential accessory for duty, tactical, and suppressive staging setups.
Armorer Bench Notes & Real-World Staging Guidance:
Fitment Matrix: Fits FN America FNX-45 Tactical factory optics-ready slides exclusively. Mounts Holosun HE509T, HE509-RD, and HE509-GR series enclosed red dot sights. (Note: Will NOT fit standard non-tactical FNX models or FN 509 pistol slides).
- Perform a complete firearm safety check: drop the magazine, lock the slide rearward, and visually/physically inspect the chamber to verify zero live rounds are present.
- Clean and degrease the FNX-45 Tactical slide optic pocket and threaded screw holes using isopropyl alcohol or thread prep cleaner.
- Place the Holosun 509PLT-FNX45 adapter plate flush into the slide pocket, ensuring proper recoil lug engagement with the slide contours.
- Apply a drop of medium-strength blue Threadlocker (Loctite 242) to the included plate-to-slide mounting screws.
- Torque the plate mounting screws evenly to 12–15 in-lbs using an inch-pound torque wrench.
- Seat your Holosun 509 series red dot onto the plate cross-dovetail and tighten the optic's side clamping screw to 15 in-lbs before live firing.
Key Features
- Custom FNX-45 Tactical Integration: Converts FNX-45 Tactical slide pocket to accept Holosun 509 enclosed red dot footprint.
- High-Strength Steel Construction: Precision-machined steel chassis withstands violent .45 ACP recoil acceleration.
- Integrated Recoil Indexing Lugs: Absorbs slide shear forces to protect mounting screws and prevent optic zero drift.
- Corrosion-Resistant Matte Black Finish: Provides durable protection against holster friction, sweat, and cleaning solvents.
- Low-Profile Centerline Height: Maintains minimal optical axis offset for rapid red dot acquisition and co-witness alignment.
- Genuine Holosun Factory Component: Engineered directly by Holosun for perfect dimensional tolerances and lockup.
Product Specifications
- Brand: Holosun
- Model/Series: 509 Optics Adapter Plate (FNX-45 Tactical)
- MPN / SKU: 509PLT-FNX45
- UPC: 810047071044
- Firearm Compatibility: FN America FNX-45 Tactical (Factory Optics-Ready Slide)
- Optic Footprint Compatibility: Holosun 509 Footprint (HE509T, HE509-RD, HE509-GR)
- Material: Machined Steel Alloy
- Finish / Color: Matte Black
- Included Accessories: Mounting Hardware
- Weight: 0.9 oz
- Country of Origin: China / USA Operations
Holosun FNX-45 Tactical to 509T Adapter Plate
The Holosun 509PLT-FNX45 Adapter Plate is a meticulously crafted mounting plate that allows seamless integration of Holosun 509 series red dot sights with the FN FNX-45 pistol. Built from high-quality, durable materials with a corrosion-resistant black finish, it provides a rock-solid, low-profile connection for improved stability and precision. Designed for straightforward installation, this adapter is ideal for tactical operators, competitive shooters, and firearm enthusiasts alike. Elevate your FNX-45's performance and reliability with this purpose-built, FNX-45-specific solution from Holosun.
