458 Winchester Magnum
Callahan's signature weapon is a Smith & Wesson Model 29 .44 Magnum revolver, which he uses in all of the films. The gun's prominence in the films instantly popularized it. The character states the use of a "Light Special", .44 Special loads, that he loads himself because it gives him "better accuracy and control in a gun this size". He also states that it's like using Wadcutters in a .357 Magnum. He loses hold of it three times during the course of the series; first in Magnum Force, second in Sudden Impact, then in The Dead Pool. In The Enforcer, Callahan doesn't lose it, however he doesn't employ it to kill the final villain (in favor of a portable rocket launcher). Additionally, in Sudden Impact, Callahan temporarily upgraded to a .44 Automag. Contrary to popular belief, it was not an AMT firearm, but an original AMP Auto Mag built specifically for that film.[1]
In Dirty Harry, he used a Winchester Model 70 bolt action rifle in .458 Winchester Magnum for the night gunfight with the Scorpio Killer and used a switchblade during his second encounter with Scorpio. Harry also uses a Colt Python revolver to obtain ballistics evidence in Magnum Force. Other weapons Callahan uses initially in the final climax of other films include a bomb, an M72 LAW rocket launcher and a harpoon.[2] In one film, Harry's partner Frank DiGiorgio, refers to Harry's gun as a "pocket-cannon".