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noun a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing
breech closer.
WordNet
Breech"block noun
Definitions
- The movable piece which closes the breech of a breech-loading firearm, and resists the backward force of the discharge. It is withdrawn for the insertion of a cartridge, and closed again before the gun is fired.
Webster 1913
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