breechblock

American  

[breech-blok] / ˈbritʃˌblɒk /

Or breech-block

noun

Ordnance.

1. a movable piece of metal for closing the breech in certain firearms.

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breechblock British  

/ ˈbriːtʃˌblɒk /

noun

1. a metal block in breech-loading firearms that is withdrawn to insert the cartridge and replaced to close the breech before firing

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Etymology

Origin of breechblock

First recorded in 1880–85; breech + block

Example Sentences

See Examples For:

breechblock

The list of Russian firsts which pulls Pyatov up from obscurity starts with the adding machine, anesthesia, Antarctica, atomic fission, runs on to the wedge breechblock and the wool-combing machine.

From Time Magazine Archive

The wooden breechblock completely did away with the heavy hydraulic recoil cylinders which were one of the distinguishing features of the seventy-five.

From The Story of the Great War, Volume IV (of 8) Champagne, Artois, Grodno; Fall of Nish; Caucasus; Mesopotamia; Development of Air Strategy; United States and the War by Miller, Francis Trevelyan

In the bore, pent in by the polished breechblock, is a cartridge which has failed in its duty.

From A Gunner Aboard the "Yankee" by Doubleday, Russell

Brad noted that Rimov was staring at the intensity slide visible on the breechblock of his sheathed weapon.

From The Universe — or Nothing by Moldeven, Meyer

He used the blade of his pocketknife to unlock the endpiece of the breechblock, slipping out the firing pin and buttoning it into his shirt pocket.

From Time and Time Again by Piper, H. Beam