The Definition of Trigger Safety
An external, passive safety which can be found on the face of some trigger designs (most notably found on Glock firearms).
It is intended to prevent the trigger from being pulled by objects which find their way into the trigger guard area.
19 Other Firearms Definitions You Need To Know
On a revolver, a spring activated device housed in the bottom of the frame beneath the cylinder that engages alignment notches in the cylinder.
It stops the cylinder's rotation and holds it in place each time a chamber in the cylinder is in alignment with the barrel.
A firing pin which moves freely forward and backward in the breechblock.
The Chapman stance uses the same push-pull tension which defines the Weaver,
but instead of both elbows being bent, the gun side elbow is held straight and locked in place.
Assuming a right-handed shooter, the right arm is punched straight out, while the left elbow is bent and the left hand pulls back to provide tension. As a result of this change, Chapman gets its stability
from both muscle and skeletal support. This makes it a little more friendly than Weaver for those who lack upper-body muscle strength.
The face of the action of a break-open firearm which houses the firing pins and receives the direct recoil of the fired round.
The part of a revolver that holds cartridges in
separate chambers radially around a central hingepin. The cylinder revolves as
the handgun is cocked, , either to the left or to the right depending on the gun maker's design,
bringing each successive cartridge into position, and
locked into alignment with the barrel for firing.
The area inside the bore nearest to the muzzle.
There are a lot of different competitions and other games which involve firearms. These are all referred to collectively as the shooting sports.
Refers to a visible dark ring created by the primers in centerfire ammunition around the firing pin hole in the frame after much use.
The distance, or clearance, between the base of a chambered cartridge and the breech face (or bolt face) of a firearm.
This is a critical dimension, particularly in high powered rifles. If there is too little headspace, the bolt will not close.
If there is too much headspace the cartridge will not be properly supported in the chamber and the cartridge will expand upon
firing and may rupture, blasting high-pressure gas into the action and possibly into the body of the shooter.
Headspace should be .003" - .006" in a centerfire rifle. It can be checked with a set of "Go and No-Go"
gauges specific to the calibre in question. (See below.) With a standard cartridge, the headspace is
registered by the shoulder, with a belted cartridge, the headspace is registered by the forward edge of the belt.
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.
Not really a gun at all. During the U.S. Civil War,
both sides would take tree branches or tree trunks, paint them black, and position them so that they appeared to be rifles or artillery pieces.
By doing so, they could fool the other side into believing that they had more artillery than they really did.
To pull the trigger and release the hammer of a firearm without having a cartridge in the chamber.
A semi-automatic pistol in which the barrel and breechblock are locked together for only a short distance of rearward recoil travel,
at which point the two are uncoupled, the barrel is stopped and the breechblock continues rearward, extracting the spent casing from the chamber.
Upon returning forward, the breechblock chambers a fresh round and forces the barrel back into its forward position.
Most modern recoil operated semi-automatic pistols use short recoil.
An extra flange behind the bolt handle, at the rear of a bolt action receiver (notably the Mauser Model 1898),
which uses the bolt handle as an extra locking surface in the extremely unlikely event of forward bolt lug failure.
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.
The beginning of the bore of a rifled firearm. The transition between the chamber and the rifling. The area most vulnerable to erosion from high velocity cartridges.
A handgun-style fully automatic or burst-mode firearm.
A machine pistol is not the same thing as a Submachine Gun