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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.
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 ...
Sear shown in a revolver action. 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.
Bolt from a Karabiner 98k bolt-action rifle. Note the curved handle on the side for manual operation AR-15 bolt carriers AK-74 bolt and firing pin K31 bolt disassembled Slide locked back on a Desert Eagle pistol, showing the gas-operated rotating bolt mechanism
Manual Safeties are the oldest forms of "active" safety mechanism and are widely used; however, many "double-action" firearms such as revolvers do not have manual safeties as the longer, harder trigger pull to cock and fire double-action provides adequate trigger safety, while keeping the firearm in a more ready state.
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 ...
The overtorqueing sometimes results in the failure (breakage and forceful scattering) of any of the items in the jury rig (e.g., socket, breaker bar, wrench, pipe) or of the components being worked on (e.g., nut, bolt, loadbinder), and when it does so, the fragments can injure workers in the line-of-fire. [2] [3]