CLICK TO SEE THE VIDEO I FOUND THIS !!!

click at 1:36 you will see it
ive download the map yes i know
that because of "George" the asshole who dont stop folowing you, (description in video too)
the map because dumb as shit but whatever see the pic i did print screen this is a video from:
IGNentertainment
so it's a new gun i dint got it in the box yet but i will soon XD
Note: When you start, the first door to open is the one who go to the boat(and power)i saw the mystery box there but im not sure if it's always there.

EDIT: i played for 5 hours in the new map and i got it 3 times :P it's called the v-r11 i think,
and when george become hungry, you can you him with it at the place of putting him in water.
some say that when you pack-a-punch the v-r11 and you get george in water you shoot him and............................. HE DIE!! but it's only a rumor you can try it....
us, we could not because everytimes we could pack-a-punch a gun, we dint get it :(
too bad...

oh and when you shoot a zombie with this gun, he become human but he go kill himself in the water....

RE EDIT: if you pack-a-punch the vr-11 you shoot george when he is in the water he die only for 2 rounds. after theses 2 rounds you need to do it ag again....
YOU CAN KILL HIM LIKE THIS TOO: with the pack-a-punch scavenger, you him EVERY clips and bullets you have in your gun until he die or until it written no ammo WHEN HE IS IN THE WATER or it wont do anything.

-dominicl14