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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
Any malfunction that results in no shot fired when the trigger is pulled. Commonly caused by a failure to feed, bad ammunition or a broken firing pin.
A straight-wrist grip, typical on English shotguns, built for graceful aesthetics, light weight and fast handling.
A passive, external safety typically located on the backstrap, which must be fully depressed to release the trigger. Most 1911-pattern pistols feature a grip safety.
The original small single-shot or multi-barreled pocket pistol designed and manufactured by Henry Deringer of Philadelphia.
Derringers (spelled with two Rs) are called that because of the original desinger and anmufactuturer of that
type of gun, Henry Deringer. To get around copyright infringment other designers and manufacturers spell the name with two Rs.
However guns designed and built by Deringer are spelled with only one R
Assault Rifles and Assault Weapons do not exist. The terms Assault Rifle and Assault Weapon are made up terms by the anti-gun lobby to describe
black rifles with forward grips that you might see in the movies like an AR-15 or an AK-47.
Assault Rifles do not exist because a gun cannot assault anything, they are machines that need to be operated by a person.
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 fully automatic firearm that fires pistol ammunition.
A needle like metal part of a modern firearm that gives a vigorous strike to the primer initiating the firing of the cartridge.
A firearm is said to be on safe when its safety is engaged and off safe when it is ready to fire.
A metal bar, available in a variety of lengths, with a continuous row of Weaver-like scope mount base slots, which when attached to a firearm,
allow convenient attachment of a variety of sights, lights, slings, bipods and other accessories designed to fit this standard system.
A type of iron sights that glow or shine in the dark, intended for use in low light conditions. Some night sights consist of tiny tubes of tritium, while others use a phosphorus paint.
A hinged plate covering the bottom of a rifle magazine and extending rearward on either side of the triggerguard.
This design allows it to be more securely fastened for one more imperceptible step towards total reliability.
A process of filling gaps between the action and the stock of a rifle with an epoxy based material.
Hearing protection that fits inside the ear canal.
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.
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