breechblock: meaning, definition, pronunciation and examples
C2Technical / Military
Quick answer
What does “breechblock” mean?
The movable metal block in a firearm that closes the rear (breech) end of the barrel after loading and against which the cartridge base rests when firing.
Audio
Pronunciation
Definition
Meaning and Definition
The movable metal block in a firearm that closes the rear (breech) end of the barrel after loading and against which the cartridge base rests when firing.
A locking component in the action of a breech-loading weapon, part of the bolt or slide mechanism. In engineering contexts, it can refer to similar heavy locking mechanisms in industrial presses or large-calibre artillery.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or use between British and American English. The term is technical and shared. Spelling is identical.
Connotations
Neutral technical term in both varieties, associated with weaponry and machinery.
Frequency
Extremely rare in general usage but standard in specialist contexts in both regions.
Grammar
How to Use “breechblock” in a Sentence
The breechblock [verbs: slides, locks, houses the firing pin, retracts, closes, opens]To [verb: remove, install, inspect, clean] the breechblockVocabulary
Collocations
Examples
Examples of “breechblock” in a Sentence
verb
British English
- [Not used as a verb]
American English
- [Not used as a verb]
adverb
British English
- [Not used as an adverb]
American English
- [Not used as an adverb]
adjective
British English
- The breechblock mechanism is jammed.
- A breechblock failure halted the firing sequence.
American English
- The breechblock design is patented.
- They inspected the breechblock assembly.
Usage
Meaning in Context
Business
Not used.
Academic
Used in historical, engineering, or military science texts discussing firearm or artillery mechanics.
Everyday
Not used.
Technical
Primary context. Refers to the specific component in firearms, artillery, and some industrial presses.
Watch out
Common Mistakes When Using “breechblock”
- Misspelling as 'breachblock' (a breach is a gap, breech is the rear).
- Using it as a general term for any part of a gun.
- Confusing it with the 'bolt carrier' (the breechblock is often a part of the bolt assembly).
FAQ
Frequently Asked Questions
In many firearms, the breechblock is the core locking component housed within the bolt carrier group. In simpler designs, like bolt-action rifles, the entire bolt unit serves as the breechblock.
Almost exclusively in technical manuals for firearms, historical texts on weaponry, or engineering documents for heavy machinery that uses similar locking mechanisms.
Yes, the term applies to the locking mechanism in both historical and modern breech-loading firearms, from 19th-century rifles to contemporary artillery.
'Breech' specifically refers to the rear part of a firearm barrel or a person's buttocks. 'Breach' means a gap, break, or violation. The component blocks the 'breech', hence the spelling.
The movable metal block in a firearm that closes the rear (breech) end of the barrel after loading and against which the cartridge base rests when firing.
Breechblock is usually technical / military in register.
Breechblock: in British English it is pronounced /ˈbriːtʃblɒk/, and in American English it is pronounced /ˈbriːtʃblɑːk/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[none]”
Learning
Memory Aids
Mnemonic
Think of a door blocking the REAR (breech) of a gun's barrel. The BREECHBLOCK is the BLOCK that locks the BREECH.
Conceptual Metaphor
[Not applicable for this highly technical term]
Practice
Quiz
What is the primary function of a breechblock?