The Definition of Intercepting Sear
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.
19 Other Firearms Definitions You Need To Know
A process that increases the diameter of a workpiece by compressing its length.
A rapidly burning powder made by absorbing nitroglycerine into nitrocellulose (guncotton).
A small hinged or sliding door covering the ejection port of a firearm to prevent detritus from clogging the works.
A smooth bore long gun that shoots a group of pellets called shot instead of bullets.
Depending on the bore size and the size of the pellets there may be from less than 10 to two hundred or more pellets in a single shotgun cartridge.
Shotguns are designed for shooting moving targets (such as flying birds or running rabbits) at close range.
The action of moving live cartridges from the magazine of a firearm into the chamber.
An economical method of bringing new life to a damaged pair of barrels, regardless of their original method of jointing.
The ribs are removed. The barrels are cut off 3" - 4" from the breech end and discarded. The bores of the remaining breech-end are reamed out oversize.
New tubes are fitted down into the original breech section and filed down to fit flush. The original ribs are then replaced. Sleeving is considerably less expensive than building a completely new set of barrels. Much of the time required to build a set of barrels is concentrated in the fitting of the breech end to the receiver; this work is salvaged through sleeving. Sleeving can be recognized by a pair of circumferential lines around the barrels a few inches from the breech; the more invisible, the finer the job. A sleeved gun should always be identified as such amongst the proof marks, and if done in England must be properly reproofed. Photo
Sleeving is not the same thing as Monoblocking.
A type of firearm in which the action is closed, with a cartridge in the chamber prior to firing. When the trigger is pressed the cartridge is fired,
and the action cycles loading another cartridge into chamber and when firing is stopped the bolt remains closed and the chamber remains loaded.
The forward end of the bolt which supports the base of the cartridge and contains the firing pin.
Latin word meaning "for war." It is actually the proper name of the semiautomatic pistol commonly known in the USA as the "Luger.
Because of that pistol and the ammunition created for it, the common 9mm cartridge used nowadays is also known as 9mm Parabellum or 9mm Luger."
Bull barrels are barrels that are not tapered at all. These very heavy barrels, designed for extreme accuracy, are usually seen on target rifles.
A shotgun term which refers to the manner in which the pellets spread out as they exit the gun.
"The pattern" refers to the overall shape of the entire set. A tight pattern is one in which the pellets are closely grouped when they land on target.
A loose pattern is one in which the pellets are widely spread.
A colloquial term to describe a break-open gun, of any quality but often of the very highest,
bearing the least possible decoration; having an all-blued receiver with either no
engraving at all or only a simple borderline.
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A type of firearms magazine that is cylindrical in shape, similar to a drum.
Probably the most recognizable drum magazine is the magazine for a Thompson carbine rifle, also known as the Tommy Gun.
German for a short rifle or carbine.
Covered compartment in the buttstock of a rifle used to carry patches or other small items.
A gun with more than one barrel, the most common being the double-barreled shotgun.