The MBR, or battle rifle topic is all over the web. From what I read, most folks say that a MBR has to be a .308. I'm assuming the MBR is supposed to be a SHTF gun. Why would you need a MBR if you're readily equipped with an AR15 or AK47 if SHTF? Aren't this both more than capable if you had to fight? Wanna kill these ads? We can help!