Manufactured in the USA, the Forward Controls Design OPF-M17 mounting plate is engineered to securely mount a Trijicon RMR red dot sight on select SIG Sauer M17, M18, and P320 pistols. Constructed from durable 4140 steel with a Melonite finish, the plate offers enhanced corrosion resistance and long-term reliability. Designed for precision fitment, the OPF-M17 features front and rear support for the optic along with threaded posts that align with the sight-to-mount screws to minimize any movement during operation. This ensures a stable and consistent mounting platform for red dot optics. Compatibility Notice:Not compatible with MIL-issued M17/M18 models, P320 Pro Cut, P320 Subcompact, AXG, or RX variants. Installation of Steiner MPS optics may require additional tapping for proper seating. Holosun optics may require extra fitting. When removing the plate from the slide, it is recommended to secure the loaded chamber indicator (LCI) to prevent damage.