If you intend to use a red dot sight such as the Docter or J-Point then you can have BME make a slide mount for you. I have used their slide mount for Docter red dot on my 945 and 952.
+1 on what TSQUARED said. BME makes really nice mounts. I have them on my model 41 and 52 with Ultradot L/Ts. Really light and well made products. I am going to put the same set up on my model 952 next.