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English - English
Definition of breechblock in English English dictionary
The metal block that closes the breech of a breech-loading gun after insertion of the cartridge
It is withdrawn for the insertion of a cartridge, and closed again before the gun is fired
a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing
The movable piece which closes the breech of a breech-loading firearm, and resists the backward force of the discharge