Made at shackspace: Nerf Accessory Rail Adapter
Fed up with the stock Nerf accessory rail not suitable for mounting regular soft-air mods, shackspace resident hacker hadez took to the laser cutter and quickly designed a clip-on adapter that fit his N-Strike Nitefinder.
The result now allows for mounting of off the shelf reflex scopes. Of course you can cut your own using the template available online.