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Firearm action

From Academic Kids

In firearms terminology, an action is the system of operation that the firearm employs to seal the breech (in a breech-loading firearm), and to load consecutive rounds. Most commonly this is accomplished by means of a breech-block, which reciprocates in the receiver of the firearm. Important factors in the naming of a particular action type depends on how it gets its motive force (i.e. what energy is employed to operate), and how it locks the breech.

The following list shows most of the various types of breech-loading firearms that exist:

Contents

Recoil-actuated

Blowback/forward

Delayed Blowback

Gas-actuated

Manually operated magazine fed breech loader

Manually operated single shot cartridge loading

  • Falling Block (Sharps)
  • Rolling block (Remington)
  • Trapdoor (Springfield)

Breech loading single shot without cartridge

  • Hall Breechloader used a short breech section that tilted up for reloading
  • Ferguson Breechloader used a lever test operated, threaded port, perpendicular to the line of bore

Muzzle loading rifles

  • Matchlock - trigger swings lit match to ignite powder train
  • Arquebus - trigger releases mechanical watch spring which rotates steel against flint, creating a shower of sparks, which ignites the powder train
  • Snaphaunce - trigger releases spring loaded flint strike steel to ignite powder train
  • Flintlock - trigger releases spring loaded flint to strike steel, simultaneously opening path to powder train, to ignite powder train
  • Percussion - trigger releases spring loaded hammer to strike cap containing explosive mixture to ignite powder
  • Inline percussion - trigger releases striker or hammer to cause firing pin to strike cap containing explosive mixture to ignite powder
  • Electrical ignition, selective fire - metal storm

External power

Locking mechanisms

See also

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