Dirty Harry

Smith & Wesson Model 29

The script called for Detective Harry Callahan (Clint Eastwood) to use a Smith & Wesson Model 29, chambered in .44 Magnum throughout the film. The revolver used was said to be a Model 57 in .41 Magnum.

S&W Model 29 - .44 magnum.

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Dirty Harry holds his model 29

Winchester Model 70

This .458 Winchester Magnum chambered rifle is used by Harry Callahan (Clint Eastwood) in the night rooftop shoot out with Scorpio.

Modern update of classic Winchester Model 70 with open sights - .30-06.

Winchester Shotgun

The suspects participating in the famous bank robbery sequence at the start of the movie appear to be using the Winchester Model 1912 or the Winchester Model 1897.

Winchester Model 1912 "Trench" with heat shield and 1917 bayonet lug.

Winchester Model 1897 12 guage militarized

Walther P38

Scorpio steals it by attacking a liquor store owner and obtains it. He uses it to hijack a bus and in the final gunfight with Harry Callahan.

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Scorpio grabs his Walther P38 before he is shot by Callahan

Walther P38 pistol (manufactured at the Mauser Factory) - World War Two dated - 9mm

MP40

Scorpio fires it at Detective Chico Gonzales during the fight at the base of the Mt. Davidson Cross as well as the rooftop gunbattle between Scorpio and Callahan. It is also seen briefly in another scene when Scorpio is assembling his sniper rifle on a rooftop. The MP40 is carried in the same case with the rifle as are spare magazines.

MP40 submachine gun - 9mm

MP40 9mm

Unidentified Rifle

Scorpio's Rifle, as shown in:
        -  Opening snipe-scene on the roof-top pool
        -  Above Washington Square(Good view of rifle in the suit-case dis-assembled)
          Scorpio's Rifle is....:  A WWII Japanese Arisaka Paratrooper Takedown Rifle, re-built into a wooden hunting stock with differnt 
     chromed or stainless bolt-handle.  If you look simply Google: "Arisaka Paratrooper rifle", you will see this. 
     Discerening feature is the takedown-joint you can clearly see in the film when Scorpio opens his suitcase over Washington Square.
     The metal-joint between the barrel and the receiver, is un-mistakabely the Japanese Arisaka Paratrooper takedown rifle.
     Thousands of Arisaka's were brought back to the U.S. after WWII, many were converted from the Japanese 6mm round to .25 Rogers &
     .306 cal. due to similar bolt-face sizes.  So....  Scorpio's rifle being .306 is technically & historically accurate.
     Whoever the Prop-Master for the film was, was smart and did an good job at not only picking something rare, but actually true. 
     Recap:  Scorpio's Rifle is a:  WWII Japanese Arisaka Paratrooper takedown rifle, re-fitted into a hunting stock. Socom-Pro