breechblock

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Related to breechblocks: breech mechanism

breech·block

 (brēch′blŏk′)
n.
The metal part that closes the breech end of the barrel of a breechloading gun and that is removed to insert a cartridge and replaced before firing.

breechblock

(ˈbriːtʃˌblɒk)
n
(Firearms, Gunnery, Ordnance & Artillery) a metal block in breech-loading firearms that is withdrawn to insert the cartridge and replaced to close the breech before firing

breech•block

(ˈbritʃˌblɒk)

n.
a movable piece of metal for closing the breech in certain firearms.
[1880–85]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.breechblock - a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firingbreechblock - a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing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
References in periodicals archive ?
Throughout its 20-year lifespan in the service, numerous changes were made to the Springfield Trapdoor--including stocks, triggers, lockplates, breechblocks, stampings, hammer profiles and rear sights.
For example, a few years ago the arsenal received an Army contract for about $14 million to replace more than 400 breechblocks for the Army's lightweight 105mm M119A2 towed howitzer.
Despite being a Model 1868, breechblocks will be found dated 1869 and 1870.
The remaining 7 companies were besieged on a ridge above the Little Bighorn River but fought off the Indians with their Model 1873 "trapdoor" carbines, so named because of their hinged breechblocks.
When Joe Customer comes around to kick the tires, be sure to tell him to beware of breakbarrel rifles that have only pivot pins and not bolts on their breechblocks, for they surely will work loose before the first tin of pellets is gone.