The Definition of Rail
A feature on some guns which allows various aftermarket accessories to be attached the firearm such as flashlights or lasers.
On pistols, if equipped, the rail is on the underside of the frame below the barrel.
On rifles, a rain can be found above or below the barrel, with AR type rifles, the forestock can be made of rails allowing all kinds of attachments in various positions.
19 Other Firearms Definitions You Need To Know
The use of an electric current to fire a cartridge, instead of a percussion cap. In an electronic-fired firearm an electric current
is used instead to ignite the propellant, which fires the cartridge as soon as the trigger is pulled.
A lever on a break-open gun mounted to the top of the receiver which, when pushed with the thumb (normally) to the right, operates (usually) a
Scott Spindle, which in turn withdraws (usually) a Purdey Underbolt from the bites in the lumps of the barrels,
allowing them to hinge downwards and the gun to open.
The measurement from one side of the bore to the other. In a rifled barrel this means measurement of the bore before the rifling grooves are cut.
A regular pattern of fine grooves cut into
the surface of a stock to aid in gripping a gun. Originally done for utility only,
checkering has become an art form in itself; craftsmen adorning the borders with ribbons,
fleur-de-lys, floral carving, etc. The amount of coverage, the precise regularity, and the
number of lines per inch indicate the quality of the work. Too-fine checkering, however,
defeats the purpose of the work altogether.
Failure of a spent case to completely eject from a semi-automatic firearm. The case usually stands on end while lodged in the ejection port.
A needle like metal part of a modern firearm that gives a vigorous strike to the primer initiating the firing of the cartridge.
A series of projections on the bolt of a firearm designed to fit into corresponding slots in the receiver to lock the action in closed position for firing.
This means a shooter who is right-handed but left-eyed, or left-handed and right-eyed.
The tapered rear end of a bullet. This design is used to increase ballistic efficiency at long range.
Any type of accessory that can be attached to a firearm's rail.
A small hole in the barrel of a gas-operated firearm through which expanding gases escape to power the autoloading system.
The locking lugs on a break-action firearm that extend from the bottom of the barrels under the chamber(s) and connect into the receiver bottom.
A plain, functional, unembellished firearm used to hunt in rough terrain where one might prefer not to put a more expensive, deluxe grade gun at risk of damage.
Two firearms that are manufactured identical in every way and are sequentially serial numbered and are sold as a set.
The most common type of matched pair guns are cowboy style revolvers for a couple of reasons, both guns will feel exactly the same in the hands and they make the set more collectable.
A built in lock that may prevent the firearm from being fired.
A type of aperture rear sight with a large opening and a thin rim that seems to fade out when the shooter looks through it.
Sometimes installed on rifles and shotguns intended for home defense or police use.
A shotgun with two barrels, usually of the same gauge or bore.
The two types of double-barreled shotguns are over/under (abbreviated as O/U or OU),
in which the two barrels are stacked on top of each other, and side-by-side (abbreviated as SxS),
in which the two barrels sit beside each other. See photo at right for example of side-by-side double-barreled shotgun.
For double-barreled guns that use one shotgun barrel and one rifle barrel, see combination gun.
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