Upgraded weapons

The following is a list of the Pack-a-Punch weapons and the differences between them and the normal versions of the weapon.

PTRS-41 vs The Penetrator
MOSIN NAGANT VS. VODKA SHOT YOU-1

Wunderwaffe DG-2 vs Wunderwaffe DG-3 JZ

 * Cannot be upgraded if received from a Lightning Bolt.

Trivia

 * Some Pack-a-Punch weapons have the number 115 in their name, a reference to Ununpentium.
 * A few Pack-a-Punch weapons have numbers that stand for letters, a reference to "leet-speak", a symbolic alphabet that uses a combination of ASCII characters to stand for letters (5 = S, 3 = E, |-| = H, etc.). For example, a Pack-a-Punched AUG is the AUG-50M3, which can be translated as AUG-SOME, which sounds like "Awesome".
 * Weapons from World at War have a certain Pack-a-Punch camouflage scheme, while the weapons from Black Ops have a different camo scheme. In World at War, the camo is a metallic tone, while in Black Ops, the camo is more of a machinery tone with (what looks like) circuitry covering it. This does not apply to Wonder Weapon camouflages.
 * In Der Riese it is possible to Pack-a-Punch a Mosin-Nagant, a Sawed-Off Double-Barreled Shotgun w/ Grip (The Snuff Box) and a Arisaka (The Eviscerator) through modding (which were cut from the final game).
 * Mustang and Sally is a possible reference to the song Mustang Sally.
 * The Typhoid and Mary is an obvious reference to the actual person Typhoid Mary.
 * The Tokyo and Rose are likely a reference to the actual people nicknamed Tokyo Rose.
 * The Calamity and Jane are likely a reference to the film Calamity Jane
 * Upgraded, the Ray Gun's third person model does not change.
 * The Wunderwaffe DG-2 is the only weapon to have it's Pack-A-Punched counterpart changed between World at War and Black Ops.
 * The Walther P-38, obtainable via 'give all' cannot be upgraded in Der Riese.