The Definition of Shell Casing
A hollow, piece of metal (or plastic in the case of a shotgun shell) that is closed on one end except for a small hole which holds a primer.
The open end holds the bullet. The hollow portion holds the powder.
Together the assembled unit is called a cartridge.
19 Other Firearms Definitions You Need To Know
Being aware of and responsible of which direction your firearm is pointed at all times, and always keeping it pointed in a safe direction.
The part of the gun that strikes either the firing pin or the round directly when the trigger is pulled then detonates the primer of the load and discharges the gun. Hammers may be external or internal. On a striker fired gun (a gun without a physical hammer) the firing pin is considered the hammer since it releases directly when the trigger is pulled.
Also spelled blueing.
A passivation process in which steel is partially protected against rust, and is named after the blue-black appearance of the resulting protective finish.
True gun bluing is an electrochemical conversion coating resulting from an oxidizing chemical reaction with iron on the surface selectively forming magnetite
(Fe3O4), the black oxide of iron, which occupies the same volume as metallic iron. Bluing is most commonly used by gun manufacturers, gunsmiths and gun
owners to improve the cosmetic appearance of, and provide a measure of corrosion resistance to, their firearms.
An extra-deep magazine typical of large calibre rifles for dangerous game. The line of the underside of the wrist does not carry straight forward as with ordinary rifles.
Rather the rear of the magazine aligns more towards the center of the forward edge of the triggerguard,
typically allowing at least one extra cartridge to be carried.
Slang word for short barreled revolver.
A bore snake is a tool used to clean the inside (bore) of the barrel of a gun. It resembles a short section of rope with a smaller,
weighted cord attached to one end to help feed the bore snake through the barrel. A bore snake often has one or more integrated brushes to help clean the barrel,
and may also be used to apply lubricant. It is an alternative to using a cleaning rod and patches to clean the barrel of a gun.
Bore snakes are made in different sizes for different calibers and gauges of guns.
An armor-piercing shell must withstand the shock of punching through armor plating. Shells designed for this purpose
have a greatly strengthened case with a specially hardened and shaped nose,
and a much smaller bursting charge.
To prepare or charge a muzzle loader for firing.
A barrel without rifling. Smooth bore barrels are commonly used in shotguns and in large bore artillery that fire fin stabilized projectiles.
A type of backstop that catches the fired bullet and prevents it from exiting the area. Bullet traps are most commonly used on indoor ranges.
A person who can shoot up to the mechanical capability of their weapon.
A type of firearm which, utilizing some of the recoil or some of the expanding-gas energy from the firing cartridge,
cycles the action to eject the spent shell, to chamber a fresh one from a magazine, to cock the mainspring and to fire again.
Such a firearm will fire continuously as long as the trigger is held back, until the magazine is empty. A machine gun.
A firearm thus activated, but which shoots only one bullet with each separate pull of the trigger,
while often erroneously referred to as "automatic" is properly termed Semi-Automatic.
Can also be spelled Over/Under, OverUnder or Over and Under.
A firearm (most commonly a shotgun) with two barrels that are vertically aligned with each other, one on top of the other.
A popular but imprecise term used to refer to the ability of a small arms cartridge to cause a human assailant or an animal to be immediately incapacitated when shot with it. A more precise term is be Wound Trauma Incapacitation (WTI).
The face of the action of a break-open firearm which houses the firing pins and receives the direct recoil of the fired round.
Also call a Muzzle Brake. A device attached to or made as part of a firearms barrel designed to reduce recoil or muzzle movement on firing.
They generally increase muzzle blast.
A type of small arms ammunition that eliminates the cartridge case that typically holds the primer, propellant, and projectile together as a unit.
Slang for a full metal jacket bullet with a round nose.
The term is most commonly used in referring to .45 ACP caliber ammunition, but may be used for other calibers as well.