Nerf scope
thingiverse
I incorporated crosshairs into the blueprint so they can be attached to the front end of the modified scope, courtesy of DataDisrupter's ingenious design available on Thingiverse at https://www.thingiverse.com/thing:2278146.
Download Model from thingiverse
With this file you will be able to print Nerf scope with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Nerf scope.