The Definition of Breech Pressure
The amount of rearward force exerted by the propellant gases on the bolt or breech of a firearm action or breech when a projectile is fired.
The applied force has both magnitude and direction, making it a vector quantity. This is also known as
Bolt Thrust on firearms that are Bolt Action
19 Other Firearms Definitions You Need To Know
A firearm loaded through the breech.
A swing-out arm on a revolver, to which the cylinder is
mounted when opened facilitates loading and cleaning.
On semi-auto matic pistols, a lever that mechanically lowers the hammer without firing the gun.
A sidelock action where the mainspring is mounted rearward towards the butt.
The back action is often used in double rifles where the need for strength requires as
little steel as possible be removed from the bar of the action.
The substance which imparts movement to the projectile in a firearm. In a firearm, usually powder. In an airgun the propellant is air or Co2
A hammerless single shot action type whereby a breech-block, hinged at the upper rear, operated by an underlever, tilts downward to expose the chamber.
A craftsman's signature stamp, discretely placed to identify his work.
An unexpected and undesirable discharge of a firearm caused by circumstances beyond the control of the participant(s) such as a mechanical failure or parts breakage.
There are very, very few firearms related "accidents" and if the "Three Rules" are followed there will hopefully be no injury.
Accidental Discharge should not be confused with "Negligent Discharge".
A handgun-style fully automatic or burst-mode firearm.
A machine pistol is not the same thing as a Submachine Gun
Not putting your finger on the trigger until your sights are on target, then pulling the trigger smoothly, and following through by realigning the sights before allowing your finger to come off the trigger.
A type of gun barrel rifling where the traditional lands and grooves are replaced by "hills and valleys" in a rounded polygonal pattern, usually a hexagon or octagon.
Polygons with a larger number of edges provide a better gas seal in relatively large diameter polygonally rifled bores.
Smith & Wesson term for a revolver grip design introduced in the 1930s where the top of the grip extends higher than it had in earlier configurations, to provide a more comfortable hold.
A passage built into a firearm to allow the safe conduct of unexpected gas, as from a pierced primer, to minimize damage both to the gun and to the shooter.
A Federal Firearms License (FFL) is a license in the United States that enables an individual or a company to engage in a business pertaining to
the manufacture of firearms and ammunition or the interstate and intrastate sale of firearms. Holding an FFL to engage in certain such activities has
been a legal requirement within the United States since the enactment of the Gun Control Act of 1968.
A highly sensitive explosive used as a primer compound.
Hearing protection that completely covers both ears and is usually attached to a headband.
A short, lightweight rifle. Some are small enough for a young child to easily handle, while others are large enough to perfectly suit teenagers, average-sized adult women, and small-statured adult males.
Two independent rifles, built on one frame, designed to allow two virtually instantaneously quick, totally reliable shots.
The barrels may be arranged either side-by-side or over-and-under. The apogee of the gunmaker's art.
Particularly useful against dangerous game, which may be moving, and in your direction, with vengeance on its mind.
Some triggers can be pulled slightly backwards before the shooter can feel any tension and before
the hammer or striker begins to retract. Pre-travel is any movement of the trigger that begins before the trigger starts to engage.
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