The Definition of Pinfire
An early form of complete, self-contained cartridge. It included bullet, powder and ignition primer, all in one package.
The primer was located towards the base of the cartridge, but completely internally. The pin, shaped like a little finishing nail,
pointed on the inside end and resting on the internal primer, projected radially about a quarter-inch to the outside of the base of
the cartridge. When loaded, a pinfire gun showed the tips of the pins exposed through small slots in the tops of the breech faces of the barrels.
To fire, hammers fell on the pins, driving them (through the wall of the cartridge) into the internal primer.
19 Other Firearms Definitions You Need To Know
A magnifying tube through which the shooter may see the target and aim the firearm. Scopes contain a reticle, commonly in the shape of a cross, which must be properly centered upon the target for accurate aim.
Incorrectoly sometimes referred to as a silencer, it is used to reduce the sound of a firearm's discharge.
They do not actually silence most firearms but rather lower the intensity of the muzzle blast and change the sound characteristics
(works similarly to an automotive muffler by disrupting and spreading out the sound waves).
The possession, use, and transportation of silencers have been tightly controlled under federal law since 1934.
Any device which reduces the sound of discharge by more than 2 dB is considered by the BATF to be a suppressor.
What the shooter sees when looking through the sights at the target.
On an outdoor shooting range, a large pile of dirt that functions as a backstop.
The point where the projectile from a firearm hits.
A condition (status) of a shooting range that shooters may commence to fire.
A bore snake is a tool used to clean the inside (bore) of the barrel of a gun. It resembles a short section of rope with a smaller,
weighted cord attached to one end to help feed the bore snake through the barrel. A bore snake often has one or more integrated brushes to help clean the barrel,
and may also be used to apply lubricant. It is an alternative to using a cleaning rod and patches to clean the barrel of a gun.
Bore snakes are made in different sizes for different calibers and gauges of guns.
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.
The paper filler at the rear of the powder charge of the shotgun shell.
This occurs in telescopic sights when the primary image of the objective lens does not coincide with the reticle.Telescopic sights often have parallax adjustments to minimize this effect.
The superheated air created by burning powder. A gas-operated firearm is one that uses the energy from these superheated gases to work the action in semi-automatic and automatic guns.
A type of backstop that catches the fired bullet and prevents it from exiting the area. Bullet traps are most commonly used on indoor ranges.
Abbreviation for Double Action Only. Is a type of firearm in which the firing mechanism cannot be cocked in a single-action stage. Firing always occurs as a double-action sequence where pulling the trigger both cocks and then fires the gun.
Ear muff or ear plug hearing protection that have internal electronics that amplify human voices while excluding all noises louder than a given decibel rating.
Electronic hearing protection is best used when shooting outdoors. When on an indoor range they have a tendency to pick up too much echo and other muffled sounds.
The first shot from a rifle that has been cleaned, and not fired recently may go to a different point of impact, for the same point of aim than a rifle that has been fired recently.
This first shot is referred to as a shot from a cold, clean, bore.
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 highly sensitive explosive used as a primer compound.
A shotgun pattern with erratic shot distribution, generally caused by gas escaping past the wads and getting into the shot.
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