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Letter DThe Definition of Double Action
Double Action
An action type that when the trigger of a gun is pulled, the gun gets cocked and the hammer (or striker) is dropped.
This applies to both revolvers and semi-automatic guns.
On a double action revolver, when the trigger is pulled, the hammer is cocked before releasing.
With a double-action semi-automatic pistol, the hammer does not have to be manually cocked (via actually pulling back the trigger or tracking the slide), the hammer (or striker) will be cocked while the trigger is being pulled.
A firearm that only the hammer drops when the trigger is pulled is a single action gun.
19 Other Firearms Definitions You Need To Know
A term used in artillery to indicate a projectile impact beyond the designated target.
The common part of a handgun to which the action, barrel and grip are connected.
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 semi-automatic firearm whose breechblock and barrel are not mechanically locked together when fired.
In such case the breechblock immediately begins to separate from the barrel upon firing.
Blowback is used in comparatively low powered weapons, in which inertia of the breechblock, and cartridge wall adhesion against the chamber,
are sufficient enough to retard opening until breech gas pressures have fallen to a safe level.
A smooth, sometimes contoured plate, within a magazine, at the top of a spring, across which cartridges slide when being loaded into a chamber.
A deluxe set of several different associated weapons, being any combination of rifle, shotgun, various handguns, and possibly a knife or two, cased together with appropriate cleaning and loading tools.
A device fitted inside the buttstock of a heavily-recoiling gun or rifle, usually containing mercury and a valve.
As the gun recoils, the mercury is displaced temporarily, increasing the duration, and thus diminishing the
perceived impact of the recoil. The added half-pound of weight doesn't hurt either.
To jerk a firearm off target inadvertently in the instant of firing in timid anticipation of recoil. Commonly caused by learning to shoot with a gun more powerful then they are ready for.
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.
A family of smokeless propellants developed and produced in the United Kingdom from 1889 to
replace gunpowder as a military propellant. Like gunpowder, cordite is classified as a low
explosive because of its slow burning rates and consequently low brisance.
The hot gases produced by burning gunpowder or cordite generate sufficient pressure to propel a bullet or shell to its target,
but not enough to destroy the barrel of the firearm, or gun.
The rear end of a rifle or shotgun. (The portion that rests against the shoulder.)
An early firearm mechanism in which a wheel with serrated edges is wound against the tension of a strong spring and spins against a piece of iron pyrite, sending a shower of sparks into the pan to ignite the charge.
The rear portion of the barrel or firing cylinder in which the cartridge is inserted prior to being fired.
Rifles and pistols generally have a single chamber in their barrels,
while revolvers have multiple chambers in their cylinders and no chamber in their barrel.
A shooting position in which one or both knees are touching the ground and the shooter is as low as possible.
A shotgun shooting sport in which the competitors attempt to break aerial targets directed toward them or crossing in front of them from different angles and elevations. It is an Olympic shooting sport.
On a revolver, the collective ejector, manually operated through the center of an opened cylinder, when activated, clears all chambers at once.
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.
An attachment to or integral part of the barrel that redirects some of the pressurized gas that propelled the bullet out
the muzzle to the sides and possibly rearwards from the direction of the bullet travel. This reduces the recoil of the firearm.
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