The Definition of Throat Erosion
The wearing of the portion of the barrel where the gas pressure and heat is highest as the projectile leaves the chamber.
The greater the chamber pressure the more rapid throat erosion occurs which is compounded by rapid firing which heats and weakens the steel.
19 Other Firearms Definitions You Need To Know
In any mechanism, a small lever that engages a notch to actuate movement in one direction only.
Specifically, a small spring-loaded lever attached to the hammer of a revolver which actuates the cylinder to advance one
increment and move the next chamber into battery as the hammer is cocked.
Short, interchangeable cylinders, of
subtly different internal tapers, that screw into a threaded recess at the muzzle of a
shotgun. By inserting different choke tubes, one can alter the shot pattern thrown by the
A tip for a cleaning rod, a jag, with spirally-radial wires for vigorously scrubbing a gun's bore.
A shooting sport that combines both skiing and rifle shooting. It is the only shooting activity in the Winter Olympics.
There is also a summer biathlon which involves running and shooting but it is not yet an Olympic event.
The bevelled portion of the rifling at the rear end of the barrel (and the forward portion of the chamber) where the bullet first engages the lands.
A constriction at or near the muzzle of a shotgun barrel that affects shot dispersion.
Round knob, semi pistol grip.
The front sight is placed at the muzzle end of the barrel. It is often (but not always) in the form of a dot or a blade.
To attain a proper sight picture and shoot with the greatest degree of accuracy, the shooter's eye
should be focused sharply upon the front sight while shooting, allowing both the rear sight and the target to blur somewhat.
A cosmetic process to enhance the looks of firearm parts, such as the bolt. The look is created with an abrasive brush and compound that roughs the surface of the metal in a circular pattern.
A shoulder-held firearm that has two barrels; one rifle barrel and one shotgun barrel.
Most combination guns are of an over/under design (abbreviated as O/U), in which the two barrels are stacked vertically on top of each other,
but some combination guns are of a side-by-side design (abbreviated as SxS), in which the two barrels sit beside each other.
The point of the trigger's return at which the gun's internal mechanisms are ready to fire another round.
A condition (status) of a shooting range that shooters may commence to fire.
A type of firearm in which the action is closed, with a cartridge in the chamber prior to firing. When the trigger is pressed the cartridge is fired,
and the action cycles loading another cartridge into chamber and when firing is stopped the bolt remains closed and the chamber remains loaded.
A pair of slender and easily-carried wooden dowels or sticks, which when held, crossed, in the fingers of the left hand while also supporting the forend of a rifle,
usually shooting offhand, provides somewhat enhanced stability for a more accurate shot.
Nickname for the U.S. M1841 Rifle, a .54 caliber muzzleloading rifle. The name comes from their use by a group of U.S.
Volunteers from Mississippi who were commanded by Jefferson Davis in the Mexican War. Some were later rebored to .58 caliber.
A compartment built into the buttstock of a long gun,
usually with a hinged cover, in which are drilled holes deep enough to hold
several spare cartridges of the type suitable for use in the specific gun.
An established place where firearms and ammunition are stored, repaired, or manufactured.
The term is misused by the media to mean more than one firearm or any quantity of ammunition, as in "they found an arsenal."