Smith & Wesson Model 29 in .44 Magnum
Remington Model 70 in .458 Winchester Magnum
Auto Mag Corp Model .44 Auto Mag
From the fourth Dirty Harry movie, "Sudden Impact," the .44 Auto Mag pistol is a large caliber semi-automatic pistol produced from 1971-1982. The short-recoil operated Auto Mag pistol featured a rotary bolt with six locking lugs located at the front similar to the M16/AR-15 rifle. The .44 Auto Mag was designed to shoot .429-inch, 240-grain bullets with comparable velocity to the .44 Magnum revolver, which is probably why it appealed to Dirty Harry Callahan.