MOA is close to an inch at 100 yrds, 2 inches at 200 yrds, 3 in. at 300 yrds and so on.

If you want a lighter gun but want the heavy barrel you ought to look into a Howa m1500 varmint. It weights under 10lbs without the scope. They will shoot under moa with ease. Nice rifles. And by the way I have one for sale if you are interested. Research them and im sure you will be impressed.