I bought a ruger mk II bull barrel a couple of years ago and put a C-more red dot sight on it. It's great for squirrle hunting it's all I use anymore. on the C-more sight you can change the size of the dot by changing the module. sold seperatly ofcoarse. it came with an 8 moa dot and I changed it to a 2 moa dot. I have a nine year old daugther that was the first gun she ever shot and she loves it. I think that type of sight is an easy way to teach a child to shoot and gun safety. it's easy for my daughter to put the red dot on the target and hit it.