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 type of machine gun or autocannon that uses an external source of power to cycle the firearm.
A complete cartridge of several obsolete types and of today's rimfire and center-fire versions
The speed at which a projectile travels. Velocity is usually measured in feet per second or metres per second.
The opening through which the empty, spent ammunition case is ejected from of a firearm.
Any substance (TNT, etc.) that, through chemical reaction, detonates or violently changes to gas with accompanying heat and pressure.
To shoot while standing and without bracing against anything. Sometimes it can also mean to shoot with your non-dominant hand.
A three-barrel gun.
Typically it has two shotgun barrels side by side on the top, with a third rifle barrel underneath.
This provides a very versatile firearm capable of taking winged animals as well as big game.
It also is useful in jurisdictions where a person is only allowed to own a single firearm.
A metal plate on which the firing mechanism is mounted on percussion and earlier firearms.
The official US military designation for the Colt .45 semiautomatic pistol adopted by the US in 1911.
The gun was designed by John Moses Browning, and produced by Colt.
During trials, the Browning-Colt design beat out several competing designs, including one from Savage and a .45 caliber version of the German Parabellum ("Luger").
The M1911 saw its first combat in the Philippines and then in World War I.
Early use showed that it could be improved and in 1921 the M1911A1 was introduced, which featured a few changes like a reocontoured frame,
shorter trigger, and a rounded backstrap. The M1911A1 remained the standard US military handgun until it was replaced in the 1980's by the Beretta M9.
However, it remains very popular with civilian shooters in the US, and has been modified extensively to update it to
conform to more modern theories of handgun usage.
A process that increases the diameter of a workpiece by compressing its length.
What the shooter sees when looking through the sights at the target.
A rib extension on a break-open gun, ending in a circular or semi-circular shape in plan (resembling the head of a doll),
mating into a similarly-shaped recess in the top of the receiver, designed to resist the tendency of
the barrels to pull away from the standing breech when firing.
Because an action's centerpoint of flexing when firing is at the base of the standing breech, not at the hingepin, a passive doll's
head extension makes an effective extra fastener, even without additional mechanical locks operated by the opening lever.
Firearms designed to be carried and used by an individual or individuals.
An early firearm mechanism in which a wheel with serrated edges is wound against the tension of a strong spring and spins against a piece of iron pyrite, sending a shower of sparks into the pan to ignite the charge.
The thumb-piece on the top rear of the hammer that enables it to be manually drawn back to full cock.
A heat-treating process that incorporates carbon into the surface molecular
structure of the steel, providing a hard-wearing surface without making the entire
receiver brittle. The parts to be casehardened are packed in a crucible with
carbon-rich media such as bone meal and charcoal, heated to bright orange, about
1800°F, then quenched in bubbling oil. Also
A unit of measure traditionally used for black powder shotgun charges. Today, used for smokeless powders on the basis of the new propellant's
equivalent performance to that weight of black powder. Thus, a shotgun shell marked 3 - 1 1/8
would be loaded with the smokeless powder equivalent of 3 drams of black powder, and with 1 ounce of shot. 1 Dram = 1/16 ounce = 437.5 grains.