Thanks on advance to anyone who takes the time to answer this simple question. I'm new to long range shooting per se, I am in the process of looking for a 22-250 for my daughter and I, notice when talking about scopes and rails people mention MOA. I know what MOA is but why is it incorporated into the base and or rings? What is the advantage to setting up this way? Finally is this the same as offset rings? I know a simple question but it's the only way to learn in my opinion. God Bless.