Holosun 509 Adapter Plate for HS507C / Trijicon RMR Footprint - Black - HS509PLT-507C - UPC: 810047071051
Product Description
The Holosun HS509PLT-507C is a precision steel adapter plate engineered to convert standard Trijicon RMR and Holosun 507C/407C footprint optic cuts to accept the Holosun HE509T series enclosed red dot sights. Designed to resolve footprint compatibility challenges, this steel mounting plate allows shooters to mount the enclosed-emitter 509 optics onto slides already milled for industry-standard RMR pattern cuts without requiring custom machining or slide modification.
Precision-machined from high-strength steel with a durable black finish, the adapter plate features integrated recoil indexing posts on the underside that lock directly into the slide's RMR recoil lug recesses. The top surface features a dedicated clamping dovetail rail that interfaces cleanly with the integrated side-clamp assembly of the Holosun HE509T housing, securing the optic against heavy slide velocity and recoil forces.
By keeping the deck height profile as low as possible, the HS509PLT-507C plate minimizes sightline elevation, helping retain natural point of aim and enabling potential cowitness with suppressor-height iron sights on modern optics-ready handguns.
*Armorer Bench Notes & Real-World Staging Guidance:
Slide & Optic Footprint Compatibility Matrix:
• Slide Interface: Fits pistol slides milled for Trijicon RMR, Holosun 407C / 507C / 508T footprints.
• Optic Interface: Direct clamping surface for Holosun HE509T series enclosed red dot optics.
Mounting & Torque Steps:
1. Clean slide optic pocket and threaded screw holes thoroughly with degreaser.
2. Seat the adapter plate firmly into the RMR slide pocket, ensuring underside recoil lug posts register completely.
3. Secure plate to the slide using supplied flat-head screws torqued to 15 in-lbs (apply blue medium-strength threadlocker to screw threads).
4. Slide the HE509T optic onto the top dovetail rails and torque the optic's cross-clamp screw to 15 in-lbs.
Key Features
- Converts Trijicon RMR / Holosun 507C slide footprints to accept Holosun 509-series enclosed optics.
- Precision CNC-machined steel construction prevents plate flexing and lug shearing under recoil.
- Corrosion-resistant black finish offers long-term environmental protection.
- Engineered with a thin deck height to keep the optic's optical axis as low to the bore as possible.
- Underside recoil indexing lugs distribute shear force evenly across the slide interface.
- Includes mounting screws engineered for standard RMR slide hole patterns.
Product Specifications
- Brand: Holosun
- MPN / Model: HS509PLT-507C / 509PLT-507C
- UPC: 810047071051
- Material: Machined Steel
- Finish: Black
- Slide Footprint Fitment: Trijicon RMR / Holosun 407C / 507C / 508T
- Optic Footprint Fitment: Holosun 509 (HE509T)
- Mass: ~0.8 oz
