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  2. Firing pin - Wikipedia

    en.wikipedia.org/wiki/Firing_pin

    The hammer and fixed firing pin of a Smith & Wesson Model 13 revolver. A firing pin or striker is a part of the firing mechanism of a firearm that impacts the primer in the base of a cartridge and causes it to fire. In firearms terminology, a striker is a particular type of firing pin where a compressed spring acts directly on the firing pin to ...

  3. Slamfire - Wikipedia

    en.wikipedia.org/wiki/Slamfire

    The free-floating firing pin of AR-15 style rifles typically causes an indentation as the firing pin lightly strikes the primer when the bolt closes as it chambers a loaded cartridge. Although a single light indentation may not detonate the primer, [ 2 ] the indentation may make the primer more sensitive to subsequent impact.

  4. Electronic firing - Wikipedia

    en.wikipedia.org/wiki/Electronic_firing

    Electronic firing. Electronic firing refers to the use of an electric current to fire a cartridge instead of a centerfire primer or rimfire primer. [1] In modern firearm designs, a firing pin and primer are used to ignite the propellant in the cartridge which propels the bullet forward. The firing pin must travel a short distance, creating a ...

  5. Open bolt - Wikipedia

    en.wikipedia.org/wiki/Open_bolt

    Open bolt. A MAC-10 submachine gun. A firearm is said to fire from an open bolt or open breech if, when ready to fire, the bolt and working parts are held to the rear of the receiver, with no round in the chamber. When the trigger is actuated, the bolt travels forward, feeds a cartridge from the magazine or belt into the chamber, and fires that ...

  6. Microstamping - Wikipedia

    en.wikipedia.org/wiki/Microstamping

    Microstamping. Microstamping is a proprietary ballistics identification technology. Microscopic markings are engraved onto the tip of the firing pin and onto the breech face of a firearm with a laser. When the gun is fired, these etchings are transferred to the primer by the firing pin and to the cartridge case head by the breech face, using ...

  7. Needle gun - Wikipedia

    en.wikipedia.org/wiki/Needle_gun

    Dreyse needle gun, model 1862. A needle gun (or needle rifle for varieties with rifling) is a firearm that has a needle-like firing pin, which can pass through the paper cartridge case to strike a percussion cap at the bullet base.

  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. Hammer (firearms) - Wikipedia

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

    Hammer (firearms) Hammer uncocked (top). Hammer cocked (bottom). The hammer is a part of a firearm that is used to strike the percussion cap / primer, or a separate firing pin, [1] to ignite the propellant and fire the projectile. It is so called because it resembles a hammer in both form and function.

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