breech closer

Noun
  1. A metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing (synset 102899336)
    is a type of: block, blockage, closure, occlusion, stop, stoppage - an obstruction in a pipe or tube
    is a part of: breech, rear of barrel, rear of tube - opening in the rear of the barrel of a gun where bullets can be loaded
    same as: breechblock

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