Pack-a-Punch Machine

The Pack-a-Punch Machine is an in-game utility for the Nazi Zombies map "Der Riese" and Call of Duty: Black Ops zombie mode. This utility is much like the Mystery Box or the Perk-a-Cola machines. The Pack-a-Punch Machine allows upgrades to the majority of the weapons found in the zombie level. The machine also changes the names of weapons, as well as putting elaborate engravings on them. The Pack-a-Punch Machine requires the power to be on, all three teleporters to be linked to the mainframe, and a compatible gun along with 5000 points. It has been confirmed to return to the zombie mode in Black Ops.

Effects on weapons

 * Main article: Pack-A-Punch Weapons

NOTE: When Pack-a-Punched, most weapons produce red muzzle flash and a strange firing sound.

Trivia

 * Above the Pack-a-Punch Machine, there are two depictions of a Ray Gun, one with a 'flaccid' barrel and the other with an 'erect' barrel.
 * Any weapon which can be purchased off the wall can sell players ammo for that weapon once upgraded for 4500 points.
 * There is also a picture under the machine. The picture is a no symbol (a red circle with a diagonal slash inside) with a hand inside of the circle; indicating that you should be careful not to get your hand caught when putting your gun into the machine. This is similar to the ball return machine at a bowling alley.
 * When a weapon is upgraded in the Pack-a-Punch Machine, only the metallic parts and the magazine are engraved with the markings, and not the wooden parts of the weapon. This is easily attested by the Gewehr 43, and the M1 Garand. This is similar to how the camouflages of Call of Duty 4: Modern Warfare would also only cover the metal/polymer parts of weapons. However, the PPSh-41's wooden grip is made metallic, but not engraved.
 * The Pack-A-Punch also gives the player's weapon full ammo, so a gun with no ammo can be upgraded and come out with maximum ammo.
 * When a weapon is being upgraded a small red flag that says "Please Wait" rises on the right side of the Ray Gun depictions, above the machine.
 * When a weapon is upgraded in Pack-a-Punch, a small jingle will play like Perk-a-Cola machines and at the end, there's a wolfman howl after the end of the jingle.
 * The character always cracks their knuckles (possibly nervous about results or being left without a gun, or maybe excited about what sort of new toy they will get) as they wait for their weapon to be upgraded. This will leave the player unable to fire for a second or two, so it is inadvisable to upgrade a gun in the middle of a round.
 * The Wunderwaffe DG-2 has, like most other guns, a red lightning bolt when fired but after a successful hit on a zombie or dog the bolt turns light blue again.
 * Some of the weapons have internet slang terms in them like FTW (For The Win), or FU-A11 (Fuck You All), b1at-ch (biatch), K1l-u (Kill you), and JZ (Jizz).
 * Sometimes, the player's character will sing a Perk-a-Cola jingle while waiting for their gun to be upgraded. Dempsey sings part of the Juggernog jingle, Nikolai the Quick Revive, Richtofen the Double Tap, and Takeo does not sing.
 * The Pack-A-Punch is similar to the perks Stopping Power and Bandolier, depending on the weapon.
 * In the French version of the game, the names of the guns will remain the same; the same happens with the Spanish and Italian versions.
 * If a weapon is left in the Pack A Punch too long, a timer will start. When the timer ends, an alarm will sound and the gun will be lost.
 * When upgrading the .357 Magnum, the speed loader will have the same elaborate markings as the gun, even though the speed loader was not visibly put into the machine.
 * An extremely rare glitch on the PC is that you can knife open the Pack-A-Punch machine door. The way to do it is to have three players. On a dog round, gather up to doors. Let one player squeeze very close to the doors and get downed by a Hellhound. They should be in knifing range of the doors. They should start knifing the doors while someone revives them. When they get on their feet, the doors should be able to open. Note: to do this, no teleporters can be linked. If even one teleporter is linked, the glitch will not work. The Bowie Knife doesn't work, either.
 * The 115 in the B115 Accelerator could be a possible reference to Element 115
 * A more powerful version of the C-3000 can be found via Console commands on the PC. It is called the Holy Pistol.
 * The Pack-A-Punch machine will return in Black Ops.

Call of Duty: World At War
There are three achievements associated with this machine:


 * Elevate Your Senses is awarded for turning on the Fly Trap by shooting a control panel with an upgraded gun.
 * Pack Addict is awarded for upgrading five guns in one game.
 * Wacker Packer is for upgrading a gun for the first time.

Call of Duty: Black Ops

 * Sacrificial Lamb is awarded for killing 6 zombies after getting shot by a Pack-a-Punched crossbow bolt