"breechblock"^^ . . "a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing"@en-us . "0"^^ . "102793060"@en-us . "0"^^ . . . . "a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing"@en-us . . . "02896074-n"^^ . "breechblock"@en-us . "102334416"@en-us . . . . . . . . . "102896074"^^ . "breech closer"@en-us . .