The Definition of Aperture Sight
Also known as peep sights, range from the ghost ring sight, whose thin ring blurs to near invisibility (hence ghost), to target aperture sights that use large disks or other occluders with pinhole-sized apertures. In general, the thicker the ring, the more precise the sight, and the thinner the ring, the faster the sight.
19 Other Firearms Definitions You Need To Know
A firearm that has had numerous careful machining cuts
taken in its exterior with a view to exposing and demonstrating the functioning
of critical parts of its mechanism
A gun with more than one barrel, the most common being the double-barreled shotgun.
A malfunction in which the spent case fails to eject from a semi-automatic firearm and blocks the chamber.
As the fresh round is brought forward it cannot enter the chamber. It is cleared by
stripping the magazine from the gun, racking the slide several times to eject the spent case, and then reloading.
A mechanical safety that prevents a gun from firing when it is unintentionally dropped.
A strap, usually of leather or sturdy webbing, fitted to the fore and aft (usually) of a rifle as an aid to carrying over the shoulder and as an aid to holding the rifle steadily while aiming.
A complete cartridge of several obsolete types and of today's rimfire and center-fire versions
Slang for a full metal jacket bullet with a round nose.
The term is most commonly used in referring to .45 ACP caliber ammunition, but may be used for other calibers as well.
The small lever on a cartridge firearm, which one pulls to cause the spring-loaded firing pin to impact the primer, causing the gun to discharge.
Normally, the trigger simply connects to the sear. Pulling the trigger moves the sear out of its notch, releasing the spring-loaded hammer
to strike the firing pin which in turn strikes the primer; or the coilspring-loaded firing pin directly. Other, often-Germanic systems have their own
miniature lockwork which, when cocked, allows an exceedingly light trigger pull to discharge the firearm, a setting that would be perilous to carry in the field.
A constriction at or near the muzzle of a shotgun barrel that affects shot dispersion.
A rifle or shotgun stock that has a Monte Carlo style comb
A specialized firearm used underwater that is fired when in direct contact with the target.
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.
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.
Part of the Violent Crime Control and Law Enforcement Act of 1994.
It produced a 10-year federal ban on the manufacture of new semi-automatic assault weapons with certian specifications.
Firearms with specific features were defined as assault rifles.
Including the AR-15, certain versions of the AK-47, the TEC-9, the MAC-10 and the Uzi,
several of which had become the preferred weapon of violent drug gangs. The act also bans large-capacity ammunition magazines, limiting them to 10 rounds.
The law did not apply to weapons that were already in legal possession.
Because this law was not renewed by congress in 2004, the ban was lifted.
A type of shotgun ammunition that uses medium-sized to large-sized pellets of .24" in diameter or greater,
designed to be discharged in quantity from a shotgun. Generally the larger the pellets, the fewer of them there are in casing.
A semi-automatic pistol in which the barrel and breechblock are locked together for the full distance of rearward recoil travel,
after which the barrel returns forward, while the breechblock is held back. After the barrel has fully returned,
the breechblock is released to fly forward, chambering a fresh round in the process.
Head [of a Stock]. The forward end of a buttstock, where it meets the receiver and accepts the bulk of the gun's recoil when fired.
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.