The Definition of Caliber
The diameter of the bore of a firearm measured as a fraction of an inch.
Although such a measurement may be frequently stated in millimeters.
It is correctly expressed as ".40 caliber" (note the decimal point) or as "10 millimeter"
(without "caliber" or the leading decimal point). Caliber numbers when used to identify the size of the
bullet a gun will file are usually followed by words or letters to create the complete name of the cartridge.
These letters often represent a brand name or an abbreviation for the name of the company that first introduced the round.
19 Other Firearms Definitions You Need To Know
A needle gun is a bolt-action firearm (the first known type of bolt action rifle) that has a needle-like firing pin, which can pass through fully self-contained (paper) cartridge case to strike a percussion cap at the bullet base.
The first experimental needle gun was designed by Jean Samuel Pauly, a Swiss gunsmith, in 1812.
The first mass-produced needle gun was invented by the German gunsmith Johann Nicolaus von Dreyse, who, beginning in 1824, had conducted multiple experiments, and in 1836 produced the first viable breech loading gun model using a complete cartridge .
A device, incorporated into the design of most firearms actions that, when engaged, should prevent the discharge of the firearm.
Some safeties are more positive than others. A safety device is not a perfect substitute for the general principles
of responsible gun handling. Never point a gun in a direction you do not intend to shoot
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.
The correct technical term for the ability of a projectile to incapacitate an animal or human shot with a firearm. Incorrectly called Stopping Power.
A groove or indention around the circumference of a bullet. Its purpose is to permit the cartridge casing to be
crimped tightly against the bullet shank to hold it firmly to the casing. A groove or indention around the
circumference of a bullet. Its purpose is to permit the cartridge casing to be crimped tightly against the
bullet shank to hold it firmly to the casing.
The term referring to the action of manually drawing the hammer back against its spring until it becomes latched against the sear,
or sometimes the trigger itself, arming the hammer to be released by a subsequent pull of the trigger. Some external hammers, and all internal hammers,
may be cocked simply by pulling the trigger
The stock is the wooden, polymer, or metal handle of a long gun that extends from the trigger back to where the gun is braced against the shoulder.
An adjustable stock is one that can be easily lengthened or shortened to fit shooters of different sizes.
A small hole in the barrel of a gas-operated firearm through which expanding gases escape to power the autoloading system.
a non-magnifying gun sight that allows the user to look through a glass optical window and see a cross hair
reticle image superimposed at a distance on the field of view.
The hologram of the reticle is built into the window and is illuminated by a laser diode.
Simple clips made of metal or sometimes plastic that hold several rounds of ammunition in a row and is used to quickly fill a magazine.
The unplanned discharge of a firearm caused by a failure to observe the basic safety rules, not a mechanical failure of the gun.
The amount of change in the bore axis, measured both vertically and horizontally, while the projectile moves from the chamber to the muzzle when it is fired.
A handgun-style fully automatic or burst-mode firearm.
A machine pistol is not the same thing as a Submachine Gun
A mechanical device that protrudes from the gun when a round is in position ready to be fired, giving a visual and tactile indication that the gun is loaded.
A safety catch fitted to a hammer gun where a sliding bar moves into a slot in the inner wall of the hammer base, locking it in place in the cocked position.
The safety can then be released silently by sliding the tab, avoiding the game-startling sound of the hammer cocking.
Sloppy movement (slack) of a trigger before the actual point of let-off.
A slang term for a small inexpensive handgun. Saturday night specials have been defined as compact, inexpensive,
small-caliber handguns with perceived low quality; however, there is no official definition of "Saturday night special" under federal law,
though some states define "Saturday night specials" or "junk guns" by means of composition or materials strength.
Low cost and high availability make these weapons attractive to many buyers despite their shortcomings.
A bolt-action designed by Browning firearms.
The x-bolt action features a short 60° bolt lift. So it is fast cycling and allows working the bolt quicker without the scope getting in the way.
The power of a projectile or a load of shot at the point that it exits the muzzle of a firearm, normally expressed in foot-pounds.