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A light primer strike will result in a dead trigger and the gun will not cycle. This malfunction is not to be mistaken with a squib load which the gunpowder is ignited and the bullet fires, but is trapped in the barrel of a gun. A light primer strike will not have expanding gases as a squib load would produce as sign that there is one.
Not all single-shot firearms have extractors, though many do. Break-action shotguns, double rifles, and combination guns typically have an extractor that pushes out the casings when the action is flexed open. Most modern extractors are forceful enough to completely eject the casing from the gun (i.e. integrating the function of an ejector), but ...
In breechloading firearms, primary extraction is the initial phase (the first few millimeters) of the extraction of a spent casing from the firearm chamber. [1] After the primary extraction comes the secondary extraction where the bolt is moved further backwards, [2] and the extraction is then normally finished with the spent cartridge being ...
Most controlled feed mechanisms should not be closed on a chamber already containing a cartridge (similar to how a push feed mechanism would operate). On the short term, this can result in difficulties with closing the bolt, and therefore also difficulties with extracting the unfired cartridge from the chamber.
The mechanism of a modern gun not only must load and fire the piece, but also must remove the spent case, which may require just as many moving parts. Many malfunctions involve this process, either through failure to extract a case properly from the chamber or by allowing it to jam the action.
Depending on the operating mechanism, there are a number of places that limp wristing can cause a failure to cycle. Recoil operated firearms are more susceptible to failure of this type than blowback and gas-operated firearms, and lightweight polymer framed handguns are more susceptible than heavy, steel-framed or even lighter metal alloy handguns.
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An unintentional discharge is the event of a firearm discharging (firing) at a time not intended by the user. An unintended discharge may be produced by an incompatibility between firearm design and usage, such as the phenomenon of cooking off a round in a closed bolt machine gun, a mechanical malfunction as in the case of slamfire in an automatic weapon, or be user induced due to training ...