When it comes to iPhone cases, people usually want them to do two main things: protect their prized phone and be comfortable to use (and possibly charge the phone like the JuiceTank or the Sandberg BatteryCase). If you're willing to sacrifice comfort for more durability however, Japanese company, Marudai Corp. has got the product for you. Its newest case for the iPhone 4 is so heavily armored that the company claims it can stop a direct hit from a .50 caliber bullet, while keeping your smartphone intact.