Definition of firing pin in English:

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firing pin


The part of a firearm’s mechanism that strikes the primer of a cartridge to ignite the charge and fire the weapon: seven of my riflemen did not have firing pins
More example sentences
  • The edge of her ear was singed when the firing pin struck the primer and blew sparks out of the gap at the front of the cylinder.
  • If the primer were indented from the base of the canister, the firing pin may not be able to properly strike the primer.
  • The silver firing pin fell out and tumbled into the open desk drawer.
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