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breech and is
A metal case holds an integral primer to initiate the propellant and provides the gas seal to prevent the gases leaking out of the breech, this is called obturation.
** The base of the breech is the metal disk that forms the most forward part of the cascable and rests against the breech itself, right next to the base ring.
It uses a breech that is large enough to accept 140 mm ammunition and be mounted with both a 120 mm barrel and a 135 mm or 140 mm barrel.
A magazine is defined as a part of the firearm which exists to store ammunition and assist in its feeding by the action into the breech ( such as through the rotation of a revolver's cylinder or by spring-loaded platforms in most pistol and rifle designs ).
The handler should wait two minutes with the firearm pointed in a safe direction, then carefully remove the magazine, extract any misfed or misfired cartridge, and with the breech open carefully check to ensure there is not a bullet or other obstruction lodged in the barrel.
Midwives are trained to handle certain more difficult deliveries, including breech births, twin births and births where the baby is in a posterior position, using non-invasive techniques.
When a locking latch is released, the barrel assembly pivots away from the receiver, opening the breech and, at least on better firearms, partially extracting the spent cartridge.
The operator rotates or " rolls " the block to open and close the breech ; it is a simple, rugged and reliable design.
Patria Hägglunds, a joint venture between Finnish Patria and Swedish BAE Systems Hägglunds manufactures AMOS ( Advanced Mortar System ) which is a 120 mm automatic twin barrelled, breech loaded mortar turret.
The breech is operated manually via a screw type mechanism that rests low in an ergonomic position.
In most designs the gas port is located relatively close to the muzzle, which ensures that chamber pressure has dropped to a safe level before the breech is opened.
By far the most destructive method is to weld the weapon shut by inserting one or more armed thermite grenades into the breech and then quickly closing it.
In most breech loading guns it is essential to stop the erosion of the metal of the vent by preventing the escape of gas through it when the gun is fired.
" For muzzle loaded guns and small breech loading guns radially vented, especially those using black powder, the amount of erosion in the vent is not so serious.
This case is inserted into the gun, and when fired slightly expands and tightly fits the chamber of the gun, thus acting as an obturator and preventing any escape of gas from the breech.
Its essential feature is preventing gas escaping the breech when the gun is fired, by means of an expansive cartridge case containing its own means of ignition.
Because these are mechanically identical to live rounds, which are intended to be loaded once, fired and then discarded, drill rounds have a tendency to become significantly worn and damaged with repeated passage through magazines and firing mechanisms, and must be frequently inspected to ensure that these are not so degraded as to be unusable — for example the casings can become torn or misshapen and snag on moving parts, or the bullet can become separated and stay in the breech when the case is ejected.
* Both twins born vaginally-this can occur both presented head first or where one comes head first and the other is breech and / or helped by a forceps / ventouse delivery
In some cases, rifling will have twist rates that increase down the length of the barrel, called a gain twist or progressive twist ; a twist rate that decreases from breech to muzzle is undesirable, as it cannot reliably stabilize the bullet as it travels down the bore.
Bolt action is a type of firearm action in which the weapon's bolt is operated manually by the opening and closing of the breech ( barrel ) with a small handle, most commonly placed on the right-hand side of the weapon ( for right-handed users ).

breech and hinged
A break action is a type of firearm where the barrel ( s ) are hinged and can be " broken open " to expose the breech.
* The Tarpley carbine: This is categorized into falling block action, but the breech block is hinged unlike the others.
The British initially took the existing Enfield and fitted it with a Snider breech action ( solid block, hinged parallel to the barrel ) firing the Boxer cartridge.
Casimir Lefaucheux of Paris decided in 1834 to patent a breechloader where the barrel hinged downwards to reveal the breech ends.
A break-action firearm is one whose barrels are hinged and a latch is operated to release the two parts of the weapon to expose the breech and allow loading and unloading of ammunition.

breech and on
* Vent: A thin tube on the near end of the cannon connecting the explosive charge inside with an ignition source outside and often filled with a length of fuse ; always located near the breech.
The shells were gravity-fed into the breech through a hopper or stick magazine on top of the gun.
In 1826 Delvigne, a French infantry officer, invented a breech with abrupt shoulders on which a spherical bullet was rammed down until it caught the rifling grooves.
Essentially a modification of the Hall concept, the Burnside featured a unique conical cartridge with a crushable hollow front rim, designed to seal the breech on closing.
The M81 gun had problems with cracks developing near the breech after repeated firing, a problem that was later tracked to the " key " on the missiles that ran in a slot cut into the barrel.
In 1826, Delvigne, a French infantry officer, invented a breech with abrupt shoulders on which a spherical bullet was rammed down until it caught the rifling grooves.
This consisted of a block opening on a hinge, thus forming a false breech against which the cartridge rested.
The development of breech loading had the greatest effect on naval warfare, for the first time since the Middle Ages altering the way weapons are mounted on warships, and therefore naval tactics, now divorced from the reliance on sails with the invention of the internal combustion.
As the handle is operated, the bolt is unlocked, the breech is opened, the spent cartridge case is withdrawn and ejected, the firing pin is cocked ( this occurs either on the opening or closing of the bolt, depending on design ), and finally a new round / cartridge ( if available ) is placed into the breech and the bolt closed.
Yes, but it was opinion with the helmet of a national guard on his head, and a long sword by his side ; it was opinion, standing, match in hand, at the breech of a gun charged to the muzzle.
The barrel was shortened from 46 inches to 44 inches, and the octagonal breech plug featured on earlier models was replaced with a more rounded design.
The breech ring was square in section and on a side.
In fact in 2005, the US Ambassador at the UN complained that the incumbent, as a ' civil servant ', was not authorized to act upon information ( in this case world wide press reports on abnormal detention forms in the ' war against terrorism ' suspected to breech the rights of the suspects ) not obtained by the organisation's official channels.
Amongst the technical features of interest introduced in 1866 on the Chassepot rifle was the method of obturation of the bolt by a segmented rubber ring which expanded under gas pressure and thus sealed the breech when the shot was fired.
A shot-gun type cartridge is loaded into a breech on the engine's intake system.
At the Armored Command and Artillery Command headquarters on the northern edge of the city the communists planned to utilize captured tanks and artillery pieces but the tanks had been moved to another base two months earlier and that the breech blocks of the artillery pieces had been removed, rendering them useless.
The traditional equations predict that the recoil force acts on the breech of the railgun.

0.215 seconds.