Sights for nerf gun
thingiverse
These are some sights for nerf gun. They have a hole that can be used for threading an M4 bolt to secure it to the gun, but probably it won't be necessary. You may need to file and polish the rail end for proper fitment.
Download Model from thingiverse
With this file you will be able to print Sights for nerf gun 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 Sights for nerf gun.