Callahan's Magnum

 is a weapon which was added to Fallout 3 with the Broken Steel downloadable content pack.


 * Callahan's Magnum is a unique Scoped .44 Magnum that surpasses the Blackhawk (the other unique Scoped .44 Magnum) in damage, damage per second and AP Cost.
 * Depending on equipment and perks, the weapon can fire 1-2 more shots in V.A.T.S. than the Blackhawk.

Location
The magnum is supposedly to be found if the Citadel is chosen to be bombed by an airstrike while onboard the enclave mobile base during the "Who Dares Wins" quest. IF the citadel is destroyed enter the remnants and in a hidden enclosed office is the magnum.

PLEASE NOTE: Save before you choose to bomb the citadel. This one gun may not be worth the whole Brotherhood.

Also there have been cases stated in which the magnum is found flying out of the mobile base while watching it explode if one chooses to blow it up in the "Who Dares Wins" quest, though the accuracy of this story is questionable.

Trivia

 * The weapon's name is a reference to Harry Callahan from the Dirty Harry movies who carries a .44 Magnum as his signature weapon.