316px-Pack-A-Punch(Ascending with Stairs)

The Pack-a-Punch Machine is a utility powered by Element 115 found in every Zombies map including and after Der Riese. This utility is much like the Mystery Box or the Perk-a-Cola machines. The Pack-a-Punch Machine allows weapons to be upgraded. The machine also changes the names of weapons, as well as putting elaborate engravings on them. It costs 5000 to use (1000 if Bonfire Sale is active).

394px-Pack a Punch Upgrader

A closer look at the Pack-A-Punch Machine