Dirty Harry

The Dirty Harry or Holy Pistol, is a weapon found in Call of Duty: World at War and Call of Duty: Black Ops. It is only available through cheats on the PC version of the games or through hacks on the console versions.

Call of Duty: World at War
The gun is essentially an M1911 that shoots rifle grenades. It fires the same way as the player's pistol does when downed and the Suicide King Death Card is enabled. The player can also acquire it through the console on PC. Two similar weapons, the C-3000 and Mustang and Sally, are Pack-a-Punched pistols that act similarly, but are semi-automatic, give splash damage, and fire in a straight line instead of an arc.

Call of Duty: Black Ops
In Call of Duty: Black Ops, the Dirty Harry functions similarly to the Call of Duty: World at War version. It can be found by using the "give all" command. Upon entering the command, the user will receive all guns, including two Mustang & Sallys. The first one operates as normal, but upon equipping the second one, the left-hand pistol will disappear and only the right-hand pistol will be visible, although both triggers will fire a grenade. This version of the Dirty Harry is similar to when you have mustang and sally equipped on Call of the Dead's zipline, as it only shows one pistol.

Trivia

 * Due to the fact that the weapon was never meant to be used, several graphical quirks exist with this weapon. For instance, when sprinting with this weapon, the player holds the weapon down as if they were using an M1 Garand with rifle grenade. The reloading animation is the same for empty and non-empty magazines. Also, from third person, the player appears to throw a grenade whenever the weapon is fired.
 * This weapon's file name refers to the movie Dirty Harry.
 * This variant takes much longer to look through the sights than the regular variant.
 * While using it, the player's left-hand fingers turn red.
 * When the player has this gun out, they cannot melee.
 * In Call of Duty: Black Ops, firing the Dirty Harry takes much longer for the projectile to reach its target, and the grenades are invisible. Also, the player's arms are not visible, only leaving the gun to see.
 * When using the zipline on Call of the Dead with the Mustang and Sally, only one of the handguns appears, giving the appearance of this weapon.