The Definition of Tangent Sight
A style of rear sight, typically used on rifles for either slow-moving bullets or for long ranges, whereby a ladder may be raised from
flush with the barrel to a vertical position, and which incorporates a sliding crossbar which may be moved vertically in order to achieve significant elevation.
19 Other Firearms Definitions You Need To Know
Expanding the neck of an existing cartridge to make it use a bullet of a different caliber. A typical process used in the creation of wildcat cartridges.
A screw with about half of its threading removed in longitudinal sections. Often used at the breech end of a
takedown firearm's barrel. When the barrel's interrupted female threads are inserted into the receiver's
complementary interrupted male threads, only a partial rotation is necessary for assembly rather than many full turns.
Visible disturbance in the air by a bullet. Typically this takes the form of image distortion that persists for a fraction of a second in the shape of an inverted V similar to that of a boat wake.
A cable with a padlock at the end. It is threaded through the action of the firearm rendering the gun safe and useless until the lock is removed.
A type of firearm in which the action is in the open position and the chamber empty prior to firing.
When the trigger is pressed the bolt moves forward, chambering a cartridge and firing it and returning
to the open position. When firing is stopped the bolt remains open and the chamber empty.
A short cylindrical rod of hardened steel running laterally near the front of the bar of a break-open gun's
action around which the barrel hook revolves when the gun is opened. Over the decades, this pin and its
complimentary hook can wear and a gun can sometimes "shoot loose" or "come off the face." The proper cure
for this condition is to replace the hinge pin with a new one, slightly oversized, to compensate for wear
on both itself and on the barrel hook.
Abbreviation for Concealed Carry Permit.
A bullet not covered by a metal jacket or patch.
Also known as a Flash Hider. A muzzle attachment intended to reduce visible muzzle flash caused by the burning propellant.
Flash reducers lessen glare as seen by the shooter, but do not hide the flash from other observers to the front or side of the firearm.
The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF, BATF, and BATFE) is a federal law enforcement organization within the United States Department of Justice. Its responsibilities include the investigation and prevention of federal offenses involving the unlawful use, manufacture, and possession of firearms and explosives; acts of arson and bombings; and illegal trafficking of alcohol and tobacco products. The ATF also regulates via licensing the sale, possession, and transportation of firearms, ammunition, and explosives in interstate commerce. Many of ATF's activities are carried out in conjunction with task forces made up of state and local law enforcement officers, such as Project Safe Neighborhoods. ATF operates a unique fire research laboratory in Beltsville, Maryland, where full-scale mock-ups of criminal arson can be reconstructed.
Sometimes spelled Bi-Pod.
A support device that is similar to a tripod or monopod, but with two legs. On firearms, bipods are commonly used on rifles to provide a forward rest and reduce motion.
The bipod permits the operator to rest the weapon on the ground, a low wall, or other object, reducing operator fatigue and permitting increased accuracy.
A generally non-magnifying optical device that has an optically collimated reticle,
allowing the user to look through a partially reflecting glass element and see a parallax free cross hair or other projected aiming point
superimposed on the field of view.
Invented in 1900 but not generally used on firearms until reliably illuminated versions were invented in the late 1970s
(usually referred to by the abbreviation "reflex sight").
A trigger that doesn't have to travel very far before it reaches the break. In a 1911 semi-auto pistol, a short trigger is a different part than a long trigger,
and (in addition to providing less motion) it features a shorter reach which may be of benefit to a small-handed shooter.
The firing mechanism of a a muzzle-loading weapon. In breech-loading firearms, the lock is the firing mechanism and breech-sealing assembly.
To bring the butt of a long gun's stock to the shooter's shoulder, preparatory to firing the gun.
A firearm specially designed for use underwater.
A game of competitive clay pigeon shooting on a formally designed layout. In plan view, one launching machine is located 16 yards in front of a straight line,
firing rising targets perpendicular to and away from that line. Five competitors shoot five individual targets at each of five stations along that line.
Although each target is presented at slightly randomized vectors, trap emphasizes generally a single type of shot, outgoing and rising,
and targets are broken at generally longer ranges than Skeet.
Usually a telescopic firearm sight.