The Definition of Trajectory
The arc described by a projectile (or a load of shot) after it exits the muzzle of a firearm. Falling objects accelerate downwards at a rate of 32 feet per second, per second.
The faster a projectile travels, the greater the distance it can cover in a given time before dropping too far. Hence, the higher the velocity of a bullet, the flatter the trajectory it will achieve.
19 Other Firearms Definitions You Need To Know
On a revolver, the collective ejector, manually operated through the center of an opened cylinder, when activated, clears all chambers at once.
The area inside the bore nearest to the muzzle.
Abbreviation for Concealed Carry License.
The farthest distance that a target of a given size can be hit without holding over or under with the sights.
The exact range is determined by the performance of the cartridge used, the ZERO range, and the accepted size of the target area.
This term is not to be confused with point blank shooting.
A second sear, poised just behind a second notch in the hammer. It is possible that when a cocked firearm is dropped or sharply jarred, a
single sear could jump out of its notch and the hammer could fall, firing the gun accidentally. In this event, an intercepting sear
would engage before the hammer could fall completely, preventing an accidental discharge. On a gun with intercepting sears, only
by pulling the trigger are both sears moved out of the way simultaneously, allowing the gun to fire.
Intercepting sears are usually found on better sidelock actions. They are sometimes found on best boxlocks,
and can be recognized by an extra screw behind the action fences, in addition to the usual two screws (or pins) along the lower rear of the receiver.
The mechanism of some firearms that holds the cartridge in place during the firing process.
It must be moved out of the way to load and unload the gun; this action may be manually performed
by the shooter pulling back on an exterior knob called the bolt handle and then sending it forward again, or the action may be performed
by other moving parts within the firearm. When the user must move the bolt manually, the firearm is called a bolt-action firearm.
Contrary to some people's belief, AR does NOT stand for Assault Rifle. The designation AR stands for the original designing company ArmaLite.
An AR is a firearm platform originally designed by ArmaLite and built by Colt,
an AR is a lightweight, intermediate cartridge magazine-fed, air-cooled rifle with a rotating lock bolt, actuated by direct impingement gas operation or long/short stroke piston operation.
It has been produced in many different versions, including numerous semi-automatic and selective fire variants.
It is manufactured with extensive use of aluminum alloys and synthetic materials.
Types of ARs include AR-15, AR-10 and AR-7.
A trigger that requires a lot of pressure to pull it past the break point.
Rifles tend to have considerably lighter triggers than handguns, and even a heavy rifle trigger is often lighter than a light handgun trigger.
A pair of small dovetailed steel bases, screwed usually one to the barrel and one to the front receiver ring of a rifle,
to accept mounts for target scopes such as the Unertl where the scope is allowed to move forward in the rings under
the recoil of the rifle and which typically carry the windage and elevation adjustments in the mount.
Slang for a shotgun which is set up specifically to fire a slug (a large, single projectile) rather than shot (multiple projectiles contained within a single shell).
German for Hand-Cocking or Cocker/De-Cocker. A type of action on a break-open gun or rifle where, in place of a traditional top tang safety,
a somewhat more robust tab is fitted. Normally such a gun is carried in the field loaded, but with the action not cocked,
an exceedingly safe condition. Then, when ready to fire, the shooter, instead of pushing a safety tab forward,
pushes this larger tab forward, cocking the mainspring, making the gun ready to fire.
Then, if the shot is not taken, he may simply slide this tab rearwards again, de-cocking the gun
and returning it to the still-loaded, but very safe position.
A middle position for an external hammer that effectively provides a safety function. With a firearm with non-rebounding hammers,
when on half-cock, the firing pin will not rest on the firing-pin.
The stock is the wooden, polymer, or metal handle of a long gun that extends from the trigger back to where the gun is braced against the shoulder.
An adjustable stock is one that can be easily lengthened or shortened to fit shooters of different sizes.
Violent Crime Control and Law Enforcement Act of 1994.
It is an act of Congress dealing with crime and law enforcement that became law in 1994.
Of the sections of the bill, it included the Federal Assault Weapons Ban.
A unit of weight widely used to express the weight of bullets and of powder charges. Equal to 1/7000 pound.
The term used for the casing on modern rifle and pistol ammunition. It is usually made out of brass but can also be aluminum or steel.
The casing on a shotgun shell is usually refered to as a hull
The bevelled portion of the rifling at the rear end of the barrel (and the forward portion of the chamber) where the bullet first engages the lands.
An external, passive safety which can be found on the face of some trigger designs (most notably found on Glock firearms).
It is intended to prevent the trigger from being pulled by objects which find their way into the trigger guard area.
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