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Firearms use triggers to initiate the firing of a cartridge seated within the gun barrel chamber.This is accomplished by actuating a striking device through a combination of mainspring (which stores elastic energy), a trap mechanism that can hold the spring under tension, an intermediate mechanism to transmit the kinetic energy from the spring releasing, and a firing pin to eventually strike ...
The cylinder is most often rotated via linkage to a manually manipulated external hammer, although some revolvers are "double-action" and can use the manual pull of the trigger to drive both the cylinder rotation and hammer cocking. Some examples of firearms using the revolver principle are the Smith & Wesson Model 3 and Colt Model 1889.
Sear: A sharp bar, resting in a notch (or in British: "bent") in a hammer (or in British: "tumbler"), holding the hammer back under the tension of the mainspring. When the trigger is pulled, the sear moves out of its notch, releasing the hammer and firing the gun. [1] The term "sear" is sometimes incorrectly used to describe a complete trigger ...
The first slide action patent was issued to Alexander Bain of Britain in 1854. [1] [2] The first pump action firearm with a magazine was technically the gun patented in America on the 22nd of May in 1866 by Josiah V. Meigs although the pump action was actuated via the trigger guard rather than a sliding handguard underneath the barrel. [3]
A trigger disconnector captures the hammer in the cocked position after a shot has been fired, even if the trigger is held to the rear as the gun cycles. This ensures the gun can only fire in the semi-automatic mode, as the trigger needs to be released to 'reset' and have the disconnector release the hammer back to the trigger sear.
Daewoo USAS-12 automatic shotgun. An automatic shotgun is an automatic firearm that fires shotgun shells (thereby making it a shotgun) and uses some of the energy of each shot to automatically cycle the action and load a new round. [1] It will fire repeatedly until the trigger is released or ammunition runs out.
Lever shotguns have seen a return to the gun market in recent years, however, with Winchester producing the Model 9410 (chambering the .410 gauge shotgun shell and using the action of the Winchester Model 94 series lever-action rifle, hence the name), and a handful of other firearm manufacturers (primarily Norinco of China and ADI Ltd. of ...
Sawed-off shotgun/Sawn off shotgun/Short-barreled shotgun (SBS): A type of shotgun with a shorter gun barrel and often a shorter or deleted stock. Selective fire : A firearm that fires semi–automatically and at least one automatic mode by means of a selector depending on the weapon's design.