Forward Controls Design Optic Mounting Plate Fits FN 509

The OPF-FN509T, RMR is a single-piece, billet-machined plate specifically designed for RMR/SRO optics. It is not guaranteed to be compatible with non-Trijicon sights that share the RMR footprint. The design of the optics plate for the FN 509 Tactical is somewhat unconventional, featuring a MIM or cast steel plate with lugs for the RMR, alongside a larger plastic component lacking lugs or mechanisms to prevent lateral movement of the sight. This is not a critique of FN's design, rather, we favor