firing pin


Definition of firing pin

: the pin that strikes the cartridge primer in the breech mechanism of a firearm

Examples of firing pin in a Sentence

Recent Examples on the Web The headstamp refers to the indentation a gun's firing pin leaves on the end of a shell casing as a bullet is fired. Josh Campbell, CNN, 8 Aug. 2021 Any dust or fouling that has accumulated around the firing pin and spring can make matters worse. Tyler Freel, Outdoor Life, 26 Feb. 2021 Contact points on the bolts are polished, and the firing pin is pinned to remove any vertical movement. Michael R. Shea, Field & Stream, 22 Feb. 2021 In the most basic sense, guns work like this: A bullet is loaded into the rear of the barrel, which is a tube connected to the firing pin. Kyle Mizokami, Popular Mechanics, 24 Dec. 2020 Both feature generous internal storage capacity capable of storing a spare bolt, a firing pin, lubrication, batteries, zip-ties, or other like-sized items. Chris Mudgett, Outdoor Life, 19 Nov. 2020 It’s when your firing pin only dents the primer and the round goes off at half the force. Bill Heavey, Field & Stream, 7 Dec. 2020 When each of the six barrels moves into place, the firing pin explodes a small propellant, forcing the shell out of the casing and into the breech of the barrel. Kevin Brown, Popular Mechanics, 19 Nov. 2020 What’s a fore-end and how does a firing pin detonate a cartridge? Andrew Mckean, Outdoor Life, 2 Oct. 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'firing pin.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of firing pin

1874, in the meaning defined above

Learn More About firing pin

Time Traveler for firing pin

Time Traveler

The first known use of firing pin was in 1874

See more words from the same year

Dictionary Entries Near firing pin

firing order

firing pin

firing point

See More Nearby Entries 

Statistics for firing pin

Cite this Entry

“Firing pin.” Dictionary, Merriam-Webster, Accessed 8 Dec. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More from Merriam-Webster on firing pin Encyclopedia article about firing pin


Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!