Finding the Pack-A-Punch Machine on Five Map in Zombies Mode
To locate this device which allows upgrades to the majority of the weapons found in the zombie mode make a crawler and then go into the middle room and adjust the DEFCON level to DEFCON 5. ALL teleporters will take you to the Presidential Suite where you will find ALL the switches in that room (3 are upstairs and 1 is downstairs). When you have hit ALL four switches a 'Panic Room' will unlock and the Pack-A-Punch machine is located in there.
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