The Definition of Double Feed
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.
19 Other Firearms Definitions You Need To Know
A mounting point on a small arm that allows a bayonet or other accessory to be attached.
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.
A type of steel round shot fired from air rifles. The name originated from the size of steel balls used in a shotgun of the same size (.177 caliber). In a 12 guage shotgun shell using BB size shot, there will be typically 90 BBs in a shell
A display of gunmaking skill with a possible benefit of strengthening the wrist of a heavily-recoiling rifle,
whereby the top tang of the action is made extra long, shaped and inletted into the top of the buttstock,
extending along the top of the wrist and up over the comb.
Popularized by Holland & Holland and adopted by several of the finest contemporary riflemakers in the USA.
a non-magnifying gun sight that allows the user to look through a glass optical window and see a cross hair
reticle image superimposed at a distance on the field of view.
The hologram of the reticle is built into the window and is illuminated by a laser diode.
Some triggers can be pulled slightly backwards before the shooter can feel any tension and before
the hammer or striker begins to retract. Pre-travel is any movement of the trigger that begins before the trigger starts to engage.
The amount of propellant powder that is suitable for specific cartridge-bullet combination,
or in the case of shotshells, for a specific weight of shot and wad column.
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.
A constriction at or near the muzzle of a shotgun barrel that affects shot dispersion.
The amount of rearward force exerted by the propellant gases on the bolt or breech of a firearm action or breech when a projectile is fired.
The applied force has both magnitude and direction, making it a vector quantity.
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.
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.
More commonly known as WRF, it is a family of rimfire cartridges designed by Winchester Repeating Arms Company
A shooting sport that simulates the use of a small arm in its intended role either as a tool for hunting or personal defense.
True practical shooting limits the small arms, ammunition, and accessories used to those items that would actually be used in the role simulated.
A specialized facility designed for firearms practice.
The size of the pellets in a shotgun shell.
Helical grooves in the barrel of a gun or firearm, which imparts a spin to a projectile around its long axis.
This spin serves to gyroscopically stabilize the projectile, improving its aerodynamic stability and accuracy.