The Definition of Frangible
A bullet that is designed to disintegrate into tiny particles upon impact to minimize their penetration for reasons of range safety,
to limit environmental impact, or to limit the danger behind the intended target. Examples are the Glaser Safety Slug and the breaching round.
19 Other Firearms Definitions You Need To Know
The counter bore in the center of the base of a centerfire cartridge casing in which the primer assembly is seated.
Also known as a Flash Hider. A muzzle attachment intended to reduce visible muzzle flash caused by the burning propellant.
Flash reducers lessen glare as seen by the shooter, but do not hide the flash from other observers to the front or side of the firearm.
The thumb-piece on the top rear of the hammer that enables it to be manually drawn back to full cock.
The top of a gun's stock, where a shooter rests his cheek when mounting a gun.
As it is the top of the stock that determines the position of
one's eye, and one's eye is the rear sight on a shotgun, the position of the comb
is very important in determining the proper fit of a shotgun.
A matrix of dots, posts or lines, visible inside a rifle's telescopic sight, normally adjustable via exterior knobs for windage and elevation.
After careful adjustment at a known range, the shooter aims the rifle by superimposing this matrix onto the target. With good estimation or range,
cooperation from the wind, a clear eye and a steady hand, he may have a reasonable expectation of hitting his target.
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.
A style of rear sight, typically used on rifles for either slow-moving bullets or for long ranges, whereby a ladder may be raised from
flush with the barrel to a vertical position, and which incorporates a sliding crossbar which may be moved vertically in order to achieve significant elevation.
A firearm specially designed for use underwater.
A shotgun barrel that has a bore diameter increased beyond standard specifications, but less than the SAAMI maximum.
Done in an attempt to reduce felt recoil, improve patterning, or change the balance of the shotgun.
The forward end of the bolt which supports the base of the cartridge and contains the firing pin.
Firearm Owners' Protection Act of 1986. It is a United States federal law that revised many provisions of the Gun Control Act of 1968.
It bans civilian ownership of machine guns manufactured after May 19, 1986. Firearms made and registered before that date are not affected.
The law limits the Bureau of Alcohol, Tobacco and Firearms
from inspecting gun dealers more than once a year, with follow-up inspections allowed only
The law also specifically forbids the government from creating a national registry of gun ownership.
A firearm is said to be "zeroed in" when its sights have been adjusted so that the bullet will hit the center of the target
when the sights are properly aligned upon the center of the target. The farthest distance from a firearm at which the bullet's path and the point of aim coincide.
This term is also used to mean the process of insuring that the sights of a firearm are properly aligned so that where they
indicate the bullet will strike is in fact where it strikes.
The Glock pistol, sometimes referred to by the manufacturer as a Glock "Safe Action" Pistol, is a series of polymer-framed, short recoil operated, locked breech semi-automatic pistols designed and produced by Glock Ges.m.b.H., located in Deutsch-Wagram, Austria.
An early form of complete, self-contained cartridge. It included bullet, powder and ignition primer, all in one package.
The primer was located towards the base of the cartridge, but completely internally. The pin, shaped like a little finishing nail,
pointed on the inside end and resting on the internal primer, projected radially about a quarter-inch to the outside of the base of
the cartridge. When loaded, a pinfire gun showed the tips of the pins exposed through small slots in the tops of the breech faces of the barrels.
To fire, hammers fell on the pins, driving them (through the wall of the cartridge) into the internal primer.
A 1/60th part of a degree, the unit of measure used in adjusting rifle sights.
As it turns out conveniently, a minute of angle translates almost exactly to one inch at 100 yards
(actually 1.047 inches), to two inches at 200 yards and three inches at 300 yards
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