A gun is to be treated as loaded under nearly all circumstances. If you don’t understand that, a chamber indicator won’t help you. If you do understand that, a chamber indicator won’t help you. Same with the mag disconnect

What would be far more effective is to teach gun safety in school. Just like how abstinence and ignorance of sex isn’t an affective way to prevent accidental pregnancy, education is. And this isn’t a new concept, that used to be standard in America.