The Definition of Smokeless Powder
The propellant powder used in modern ammunition. It is not an explosive, but rather a flammable solid that burns extremely rapidly releasing a
large volume of gas. Commonly called "gunpowder" and usually made from nitrocellulose, or nitrocellulose and nitroglycerin.
It is classified as a "Flammable Solid" by the Department of Transportation.
19 Other Firearms Definitions You Need To Know
Refers to a visible dark ring created by the primers in centerfire ammunition around the firing pin hole in the frame after much use.
An action type that when the trigger of a gun is pulled, the gun gets cocked and the hammer (or striker) is dropped.
This applies to both revolvers and semi-automatic guns.
On a double action revolver, when the trigger is pulled, the hammer is cocked before releasing.
With a double-action semi-automatic pistol, the hammer does not have to be manually cocked (via actually pulling back the trigger or tracking the slide), the hammer (or striker) will be cocked while the trigger is being pulled.
A firearm that only the hammer drops when the trigger is pulled is a single action gun.
The distance between the rear sight and the front sight. As a longer lever provides greater mechanical advantage, the greater the distance between the two sights, the more inherently accurate they will be.
Generally refers to the stock and fore-end of a rifle. Can sometimes also be applied to any detachable accessories like a flashlight.
Although a misused term (even within the firearms industry), Long Colt is a designation for an ammunition cartrige developed by Colt mainly used for revolvers. The actual designation is Colt instead of Long Colt.
The term Long Colt was originally coined to avoid confusion between the .45 Colt and .45 ACP cartridges
A firing pin which moves freely forward and backward in the breechblock.
Abbreviation for Caliber.
A hollow base bullet, shaped so that, when fired, the bullet will expand and seal the bore.
It was invented by Captain John Norton of the British 34th Regiment in 1832, after he examined the blow pipe arrows used
by the natives in India and found that their base was formed of elastic locus pith, which by its expansion against the
inner surface of the blow pipe prevented the escape of air past it.
A set of holes in a target left by a succession of bullets fired from the same rifle or handgun,
using the same ammunition and sight setting. Fired (within the limits of one's marksmanship ability)
to determine the inherent accuracy of the rifle/ammunition combination,
and to aid in the proper adjustment of the sights.
A variety of pneumatic gun that propels projectiles by means of compressed air or other gas, in contrast to firearms, which use a propellant charge.
Both the rifle and pistol forms (air rifle and air pistol) typically propel metallic projectiles, either pellets, or BBs. Certain types of air guns, usually rifles, may also propel arrows.
A volume of fire delivered by a military unit. Incorrectly used by the media to mean the ability of a small arm to be discharged many times without reloading.
A unit of weight widely used to express the weight of bullets and of powder charges. Equal to 1/7000 pound.
The person who supervises stores and distributes supplies and provisions.
A type of machine gun or autocannon that uses an external source of power to cycle the firearm.
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.
A locking device, usially a clable with a padlock that you put on a firearm to render it unable to be fired buy running it through the magazine well and out the ejection port.
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