The Definition of Twist
The length, within a rifled barrel, required to accomplish one full rotation. 1:12 Twist, means a bullet passing down the bore would complete one revolution in twelve inches.
1:7 Twist, means a bullet passing down the bore would complete one revolution in seven inches, which makes it a tighter twist than 1:12.
Different weights of bullet require appropriate rates of twist.
19 Other Firearms Definitions You Need To Know
Slang term for a firearm sound suppressor.
A state of readiness of a firearm. The hammer (or similar mechanism if there is no hammer) only needs to be released by the trigger to cause the gun to fire.
To prepare or charge a muzzle loader for firing.
The distance that equates the exit pupil size of a rifle scope's
ocular lens to the entrance pupil of the user, in order to achieve the largest, unvignetted view.
This distance must be sufficient to ensure that the ocular rim of the scope does not lacerate the shooter's
eyebrow upon recoil. And, the scope should be positioned so that eye relief is suitable when the rifle is comfortably mounted.
A internal locking device built into a firearm, usually operated with a key, to render it unable to be fired. A good example of a internal trigger lock are the ones found on the
semi-automatic pistols manufactured by Bersa.
A mechanical device that protrudes from the gun when a round is in position ready to be fired, giving a visual and tactile indication that the gun is loaded.
Also known as a Case. The envelope (container) of a cartridge. For rifles and handguns it is usually of brass or other metal; for shotguns it is usually of paper or plastic with a metal head and is more often called a "shell."
On a pump-action firearm, being too gentle with the fore-end and either not pulling it all the way back at the beginning of the stroke,
or not shoving it all the way forward at the end of the stroke. Which may result in the old case or shell failing to eject and a misfeeds, or the gun
will not fire when the trigger is pulled. The term is used most often to refer to pump-action shotguns, but it is possible to similarly short-stroke any type of
firearm which requires the user to manually cycle the action (lever action rifles, for example).
Abbreviation for Concealed Firearms License.
A cartridge with its primer located in the center of the base of the case.
A device on a firearm which, when operated, results in the hammer or striker being cocked or moved to the ready position.
A second, folding or pop-up front sight bead of larger than usual size, perhaps not as accurate as a normal fine bead, but easier to see in the gloaming (twilight) or dawn.
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.
The opening in the bottom of the gun into which a box magazine is fed. On a semi-auto handgun,
the magazine well is at the base of the grip; on a rifle, it is usually placed in front of the trigger guard.
A metal, usually copper, wrapped around a lead core to form a bullet.
The bottom of the butt-end of a gun stock.
A small lever mounted to the cocking piece of a Mauser 98 action (and its copies such as the Springfield 1903),
rotating on a longitudinal axis from left (Fire), up to the top (Safe, but allowing bolt movement), and over to
the right (Bolt and firing pin locked Safe). While commendable for locking the firing pin instead of just the trigger,
its up-and-over arc of operation requires a scope to be mounted awkwardly high.
Paul Mauser is not to be blamed; when his safety was developed, telescopic sights were in such infancy as not to be worthy of mainstream consideration.
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.
The science of cartridge discharge and the bullet's flight. Internal ballistics deals with what happens inside of a firearm upon discharge.
External ballistics is the study of a projectile's flight, and terminal ballistics is the study of the impact of a projectile.
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1|