
1) Block 2) Blockage 3) Breech closer 4) Closure 5) Firearm component 6) Occlusion 7) Stop 8) Stoppage
Found on
https://www.crosswordclues.com/clue/breechblock

A breech-lock is a system for mounting camera lenses to camera bodies. The lens is attached to the camera by means of a rotating ring which is used to tighten the lens to the camera by friction. Other methods for mounting a lens to a camera include bayonet mount or thread mounts. A breech-lock can also be used to refer to the mechanism that locks ...
Found on
http://en.wikipedia.org/wiki/Breech-lock

A breechblock (or `breech block`) is the part of the firearm action that closes the breech of a weapon (whether small arms or artillery) at the moment of firing. Most modern small firearms use a bolt. Some variations of breechblocks include: A less common type of breech is the split-breech design known as the `nutcracker`. This type of breech ...
Found on
http://en.wikipedia.org/wiki/Breechblock

• (n.) 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 It is withdrawn for the insertion of a cartridge, and closed again before the gun is fired.
Found on
http://thinkexist.com/dictionary/meaning/breechblock/
Breech'block noun 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 It is withdrawn for the insertion of a cartridge, and closed again before the gun is fired.
Found on
http://www.encyclo.co.uk/webster/B/95

[
n] - a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing
Found on
http://www.webdictionary.co.uk/definition.php?query=breechblock
breech closer noun a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing
Found on
https://www.encyclo.co.uk/local/20974

a movable piece of metal for closing the breech in certain firearms.
Found on
https://www.infoplease.com/dictionary/breechblock
No exact match found.