Looking for instructions for reflex Sights on Rimfire Cartridge Guns Answered

I recently started a project to make a takedown bow , and was looking at different Ideas to make my own sights for it.  I saw that people had made Reflex Sights for Airsoft Guns and Nerf toys, but I was wondering if these would actually work for a shotgun or Rifle. I didn't see any instructables for them specifically.  

If anyone has any experience using these on a rimfire cartridge gun I would love to hear about it.