I was hoping some of you AR guys could educate me if you don't mind. I have some ARs but I'm not an expert on them at all. I was wondering what would be involved in switching a basic direct imp. rifle to 300 BO from 556. Is it just a barrel switch or do I have to change the gas block, tube, bolt, or anything else. Also, is it worth the effort, how does the 300 perform? I read one thing that says its anemic & weak, then I read that its comparable to the 7.62 X 39. Just looking for opinions/help, thanks.