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Single action The action mechanism would be the hammer with flint.
No external hammer to allow single action fire.
The single-action trigger performs only the one action of releasing the hammer to fire the bullet. The hammer must be cocked for this to occurr.
Single -Action
A single action pistol, such as the 191A1 .45 Auto, requires that the hammer be cocked before the first shot. A Double Action pistol does not need to have the hammer cocked- pulling the trigger causes the hammer to rise and fall. Some are DAO- Double Action Only- the hammer cannot BE cocked, and must be fired from a "hammer down" position. These include the Para-Ordnance LDA pistols.
A typical single action pistol or revolver requires that the hammer be manually cocked. In the case of an autoloading pistol, such as the 1911AI .45, the hammer must be cocked before firing the first shot. With a single action revolver, such as the Colt Peacemaker, the hammer must be cocked before each shot. A double action handgun does not require manual cocking of the hammer- you pull the trigger, and the hammer rises and falls. An example would be the Smith & Wesson Model 10 .38 Special. The hammer may ALSO be cocked manually before a shot. Some handguns are DAO- double Action Only- the hammer may not be cocked manually- they are fired by pulling the trigger, which will cause the hammer to rise and fall.
This is a handgun, either revolver or automatic, which requires manual cocking of the hammer to fire the gun. Examples include the Colt Single Action Army (the classic cowboy gun) for revolvers and the Model 1911 for automatics. A double action pistol will cock the hammer and fire the gun simply by pulling the trigger.
One shot for each pull of the trigger. The trigger does not cock the hammer.
Often with a semiautomatic pistol, once a loaded magazine is inserted and the slide racked, you now have a pistol that is ready to fire: there is a fresh round in the chamber, the hammer (or striker) is cocked. This CAN be a dangerous situation, if the shooter isn't going to fire the weapon immediately. In the past, a person would have to CAREFULLY lower the hammer while pointing the pistol in a safe direction. If they slipped, they would fire a bullet accidentally AND their thumb would get hurt--mashed by the recoiling slide & hammer. A decocking lever prevents such accidents by LOWERING the cocked hammer to a safe position. Once utilized, if the shooter wanted to prepare the pistol for firing, they would have to: Manually recock the hammer, if the pistol were a single action only type, or, manually recock, or utilize the pistol's long Double Action trigger, if the pistol was a Double Action/Single Action type.
Herter's was an importer, not a manufacturer. No published sn data on what they imported.
single action pistol means that the hammer has to be cocked back in order to fire. double action means you merely have to pull the trigger back and the gun will fire. some double action guns can be fired single action or double action.