breech closer


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Noun1.breech closer - a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firingbreech closer - a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing
blockage, stoppage, occlusion, closure, block, stop - an obstruction in a pipe or tube; "we had to call a plumber to clear out the blockage in the drainpipe"
breech, rear of barrel, rear of tube - opening in the rear of the barrel of a gun where bullets can be loaded
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