.44 Magnum (speed load)

 is a small guns weapon in Fallout 2. It is the only weapon in the game that can be reloaded for 1 AP instead of the usual 2, and boasts an improved range of 20 hexes.

In-game description
A .44 Magnum Revolver with a speed loader.

Location
Skeeter in Gecko and Eldridge in the New Reno Arms will attach a speed loader to a .44 Magnum for $2000. Valerie in Vault City will do it for $800, which can be reduced to $650 with a CH or Barter check. Algernon in the basement of the New Reno Arms will perform this or any upgrade for free.