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The Collaborative International Dictionary
Breechblock

Breechblock \Breech"block\, 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 It is withdrawn for the insertion of a cartridge, and closed again before the gun is fired.

Wiktionary
breechblock

alt. The metal block that closes the breech of a breech-loading gun after insertion of the cartridge n. The metal block that closes the breech of a breech-loading gun after insertion of the cartridge

WordNet
breechblock

n. a metal block in breech-loading firearms that is withdrawn to insert a cartridge and replaced to close the breech before firing [syn: breech closer]

Wikipedia
Breechblock

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.

Usage examples of "breechblock".

The magazine containing it had been concealed behind a solid-looking panel on the other side of the control room, while the breechblock of the cannon was empty when it was folded away.

As you can see, after the breach and the breechblock have been threaded, channels are cut in each of them.

He scraped the rust off the cocking bolt, sniffed the muzzle, and peered at the breechblock, then stuck in a finger and explored the interior.

The breechblock was flanked by two metal arms, themselves attached to a strong coil spring in a sheath around the lower barrel of the weapon.

The recoil force thus had to stop the forward intertia of the breech, then move it backward against the mass of the breechblock, the two flanking arms, and the force of the coil spring.

There was no gunshot, but as I drew up before the stone house the door was flung open and Mother Newberry appeared, a Hall breechblock loader in one hand.

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

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.

Rawlins shouted as he dived for an army rifle, snapped its breechblock, and fired.

He put cartridge into the breechblock, and tucked the gun into the left-hand side his belt.

They were allowed to extract the breechblock and exfiltrate with it to render the gun inoperable, but exfiltrating without specific orders to do so was a court martial offense.

The breechblocks of the wall guns clanged as the gunners cammed them open, then closed again after the loaders dropped in fresh rounds.

Nearer, a detachment of artillerymen were using hammers to smash up the dial sights and breechblocks of their guns.

The clang of the breechblocks was lost under the growing, drumming thunder of thousands of hooves.

The breechblock of a gun clanged open and the crew pushed it forward until its barrel jutted in alignment with the muzzles of the riflemens' weapons.