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  2. Recoil operation - Wikipedia

    en.wikipedia.org/wiki/Recoil_operation

    Ready to fire position. Bolt is locked to barrel, both are fully forward. Recoil of firing forces bolt and barrel fully to the rear, compressing the return springs for both. Bolt is held to rear, while barrel unlocks and returns to battery under spring force. Fired round is ejected. Bolt returns under spring force, loads new round.

  3. Blowback (firearms) - Wikipedia

    en.wikipedia.org/wiki/Blowback_(firearms)

    In firearms, a blowback system is generally defined as an operating system in which energy to operate the firearm's various mechanisms, and automate the loading of another cartridge, is derived from the inertia of the spent cartridge case being pushed out the rear of the chamber by rapidly expanding gases produced by a burning propellant, typically gunpowder. [3]

  4. Glossary of firearms terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_firearms_terms

    Bolt: The part of a repeating, breech-loading firearm that blocks the rear opening of the barrel chamber while the propellant burns, and moves back and forward to facilitate loading/unloading of cartridges from the magazine. The extractor and firing pin are often integral parts of the bolt. Bore rope: A tool used to clean the barrel of a gun.

  5. Action (firearms) - Wikipedia

    en.wikipedia.org/wiki/Action_(firearms)

    In a tilting block or pivoting block action, the breechblock is hinged on a pin mounted at the rear (in contrast with tilting bolt, which is not hinged). When the lever is operated, the block tilts down and forward, exposing the chamber. The best-known pivoting block designs are the Peabody, the Peabody–Martini, and Ballard actions.

  6. Extractor (firearms) - Wikipedia

    en.wikipedia.org/wiki/Extractor_(firearms)

    In modern dropping block, break-action (e.g. double-barrel shotguns) and revolver firearms, the extractor is a protrusible piece with flanges on the barrel/cylinder side, which pushes rearwards on the casing's rim and slides it out of the chambers. Some such extractors can push hard and far enough that they completely clear the cases out of the ...

  7. Recoil - Wikipedia

    en.wikipedia.org/wiki/Recoil

    Energy in firing a firearm comes in many forms (thermal, pressure) but for understanding recoil what matters is kinetic energy, which is half mass multiplied by squared speed. For the recoiling gun, this means that for a given rearward momentum, doubling the mass halves the speed and also halves the kinetic energy of the gun, making it easier ...

  8. Safety (firearms) - Wikipedia

    en.wikipedia.org/wiki/Safety_(firearms)

    A firing pin block is a mechanical block used in semi-automatic firearms and some revolvers that, when at rest, obstructs forward travel of the firing pin, but is linked to the trigger mechanism and clears the obstruction to the pin just before the hammer or striker is released. This prevents the firing pin from striking a chambered cartridge ...

  9. Breechblock - Wikipedia

    en.wikipedia.org/wiki/Breechblock

    A typical break-action, double-barreled shotgun. A way of closing the breech or chamber is an essential part of any breech-loading weapon or firearm.Perhaps the simplest way of achieving this is a break-action, in which the barrel, forestock and breech pivot on a hinge that joins the front assembly to the rear of the firearm, incorporating the rear of the breech, the butt and usually, the ...