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Charging handle being pulled on an M2 machine gun. The cocking handle, also known as charging handle or bolt handle, is a device on a firearm which, when manipulated, results in the bolt being pulled to the rear, putting the hammer/striker into a spring-loaded ("cocked") "ready and set" position, allowing the operator to open the breech and eject any spent/unwanted cartridge/shell from the ...
The bolt release or lever release action [15] is a hybrid repeating action that uses the physical manipulation of a bolt release lever/button to complete the cartridge chambering process.
In a firearm, the sear is the part of the trigger mechanism that holds the hammer, striker, or bolt back until the correct amount of pressure has been applied to the trigger, at which point the hammer, striker, or bolt is released to discharge the weapon. The sear may be a separate part or can be a surface incorporated into the trigger.
On firearms where the cocking handle is permanently connected to the bolt/bolt carrier, a forward assist device is not necessary as the bolt can be assisted forwards by simply pushing or tapping the cocking handle forwards. [1] [5] The forward assist is generally not necessary as a standard procedure on any firearm. An exception is the British ...
The bolt knob is the part of the bolt handle that the user grips when loading and reloading the firearm and thereby acts as a cocking handle. On many older firearms, the bolt knob is welded to the bolt handle, and as such becoming an integral part of the bolt handle itself.
A telescoping bolt is a bolt that wraps around the breech end of the barrel. This bolt design is often used to reduce overall weapon length without sacrificing barrel length or bolt weight. A turn bolt refers to a firearm component where the whole bolt without using a bolt carrier turns to lock and unlock.
This situation is encountered on some single-shot rifles, single-shot pistols (such as the break-action Thompson/Center Contender), and on some break-action single- and double-barrel shotguns. In bolt-action, lever-action, pump-action, semi-automatic, and fully automatic firearms, the extractor typically works in conjunction with a separate ...
Open-bolt designs typically remain much cooler in operation than closed-bolt types due to the airflow allowed into the chamber, action and barrel during pauses between bursts; moreover, unlike in the case of the closed-bolt format, the initial round in a burst is not introduced into the chamber until the moment before firing, and is thus only ...