I remixed this Nerf compatible sight to work for the X-Shot Reflex 6. As long as the rails are the same on all X-Shot, this sight should work. I made it so that it just snaps on to the rail since it is unable to slide on due to the design of the rail on the gun. I also shortened up the length to save plastic.
If you use it for the X-Shot Reflex 6 specifically, if you line up the front sight with crosshair, you actually have a better aim at distance.