The hammer cannot contact the firing pin. At the same time, the hammer is tripped and falls. In the Walther PPK, as an example, the lever is turned and a block falls into place covering the firing pin. In order to safely lower the hammer without a possibility of accidental discharge, there are a number of types of decocker levers in use. These shots are fired single action as the trigger drops the hammer when the trigger is pressed. Once the slide recoils, the hammer is cocked for subsequent shots. The trigger press both cocks and drops the hammer, hence the term double action. The first shot is fired by a long press of the trigger. The hammer is lowered to make the pistol safe.The slide is dropped to load the pistol. The double-action first shot pistol has many good attributes for general use, particularly for outdoors use and personal defense as a house gun. The subject of this report is a modern polymer frame double-action first shot pistol that is also desirable but affordable. While a good pistol, the Walther was expensive and sometimes finicky concerning ammunition and reliability. An exception was the seldom seen, but very desirable, Walther PPK in. Instead a firing pin in a bolt was utilized. 22 caliber rimfire self-loading pistol was a single-action design.
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