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.

General

 * 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.
 * Some of the upgraded weapons in Black Ops appear to have a rusted look, for example the The Afterburner looks covered in rust. Perhaps this is because of the time difference between the Cold War and World War Two.
 * When Pack-a-Punched, most weapons produce red muzzle flash and an alien-like firing sound.

Weapons

 * 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).
 * The soldier's loadout shown on the cover of Call of Duty: Black Ops could possibly be a reference to the Pack-a-Punched M1911, Sally. If player uses Quick Revive on single player, the player will receive the Mustang and Sally while downed if the player does not have a Ray Gun, CZ75, etc, and the ability to aquire both a Commando and an M16, both of which are seen slung over the soldier's back.
 * 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.
 * Many Pack a Punched weapons in Call of Duty Black Ops retain their original firing sound. This can easily be heard with loud and powerful guns, such as the Python, or the HK21
 * 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
 * In Black Ops, all the shotguns do the same amount on damage when upgraded. However, since it holds the most shells total, the SPAZ-24 would make the best choice.
 * FN FAL is Pack a Punched to EPC WN. Possibly a reference to the internet meme. (EPC WN = Epic Win/FN FAL = Fuckin Fail)
 * Upgraded, the Ray Gun's third person model does not change.
 * In Call of the Dead, the Wunderwaffe DG-2 is the only weapon that cannot be Pack-A-Punched.
 * The Wunderwaffe DG-2 is the only weapon to have it's Pack-A-Punched counterpart changed between World at War and Black Ops; it recieved a new model and new abilities.