A breechblock (or breech block) is the part of the firearm action that closes the breech of a breech loading weapon (whether small arms or artillery) before or at the moment of firing. It seals the breech and contains the pressure generated by the ignited propellant. Retracting the breechblock allows the chamber to be loaded with a cartridge.
Breechblocks are categorised by the type or design of the mechanism by which it is locked or closed for firing. The firearm action more fully refers to the mechanism by which the operator actuates the opening and closing of the breech.
A breechblock (or breech block) is the part of the firearm action that closes the breech of a breech loading weapon (whether small arms or artillery)...
a slot in the under-surface of the breechblock slide when the action is closed. To load the pistol, the breechblock is grasped on the serrated gripping...
1860. It uses a falling breechblock mounted in a carrier. Firing forces are contained by the receiver at the rear of the breechblock. Actuating the loading...
trapdoor is a form of breech-loading mechanism for rifles in which a hinged breechblock rotates up and forward, resembling the movement of a trapdoor. The Springfield...
horizontally sliding breechblock. To load, the rear cover plate would be rotated, exposing the back of the rectangular breechblock. The breechblock would be opened...
pierced (to contain propellant gasses). It sits within a hole through the breechblock and is struck by the hammer when the trigger is "pulled". A light firing-pin...
a closed-bolt. When ready to fire, a round is in the chamber and the breechblock assembly and working parts are forward. It has a recoil operated, floating...
with a specially shaped breechblock able to rotate on a pin. The breechblock is shaped like a section of a circle. The breechblock is locked into place by...
developed such an action based on his original idea of the rear-pivoted breechblock, for use with Springfield and Enfield muzzle-loading muskets. The Peabody...
partially threaded hole in the receptacle: threadless channels in the breechblock screw line up with the threaded parts of the receptacle, and vice versa...
breechface is the front part of the breechblock that makes contact with the cartridge in a firearm. The breech block (or breechblock) in a gun is what holds a round...
into a horizontal position, where the breech was locked with a simple breechblock. The mortar was operated by an 11-man crew and could be prepared to fire...
breechloading firearm action, where the heavy breechblock tilted downwards across a bolt mounted in the rear of the breechblock, operated by a lever under the rifle...
movement of the projectile. Blowback This action relies on the inertia of a breechblock to delay breech opening until pressures have dropped to safe levels....
adopted after 1865 used integral metallic cartridges and had hinged breechblock (Snider-Enfield, Krnka, Wänzl, Springfield Model 1873) or falling block...
Muzzle-loading rifle, some flintlock and mostly caplock Breech-loading rifle Breechblock rifle, either trapdoor, rolling, dropping, tilting or screwed Break-action...
metallic cartridge rifle. Modified in 1880 as the M80 with an improved breechblock and in 1914 as the M14 to accommodate the 8×50mmR Lebel smokeless powder...
cocked and ready to repeat the process. The hinged locking piece assisted breechblock design provides good accuracy due to the in-line travel of the barrel...
but many single-shot breechloaders also use bolt-action design as a breechblock mechanism, particularly in shooting sports where single-shot firearms...
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