.44 Magnum revolver (Fallout 2)

The .44 Magnum Revolver is a small gun in Fallout 2 and Fallout 3. In Fallout 2, can be upgraded to the .44 Magnum (Speed Load). This weapon returns in Fallout 3, along with a scoped version.

In-game description
Being that this is the most powerful handgun in the world, and can blow your head clean-off, you've got to ask yourself one question. Do you feel lucky? Well, do ya punk?

Location
Flick in the Den sells this weapon, as does Happy Harry in Vault City.

Easter Egg
The Fallout 2 description of this weapon is easter egg from Dirty Harry film.

Fallout 3
The .44 Magnum Revolver returns in Fallout 3 as the Scoped .44 Magnum.

The normal .44 Magnum is found in vault 87 in a safe only obtainable through console commands (Check validity - no Pip-Boy model/extreme damage (10000)), and it is used by the Mysterious Stranger.