The RMR plate will only work with Holosun optics that share the RMR footprint, The supplied Masada RMR screws are to long and will need trimmed to 10MM length. This is achieved by removing around 5 threads from the factory supplied screws OR purchasing M3x-0.50x10MM screws. Mounting the Holosun optic without the proper screw length will damage the extractor spring and may cause issues with the firearm going into battery.