Exactly. Above all real world combat experience cannot be trained. Nobody can predict how you react when under fire, at least that was my impression in Charikar province, Afghanistan in ca. 2004. Knowing the basics will definitely be helpful though.

He’s right, you know. If you own an AR you shouldn’t slack on practice. Go to the gun range regularly. Train how to clean and maintain it. You may one day be facing people who are well trained.