Search results
Results from the WOW.Com Content Network
An extractor also performs the function of an ejector in revolvers. When the striking force applied to the ejector rod is hard and fast enough, the extractor will typically eject the empty case(s) from the cylinder. Some break-action shotguns are also designed to eject empty shells completely out of the chamber when the barrel is opened.
Animated sequence of how a bore evacuator works. A bore evacuator. A bore evacuator or fume extractor is a device which removes lingering gases and airborne residues from the barrel of an armored fighting vehicle's gun after firing, particularly in tanks and self-propelled guns.
The rim on a "rimless" case is almost or exactly the same diameter as the base of the case. A recess formed between the rim and the body of the cartridge is known as an extractor groove, allowing the case to be grasped by an extractor after being fired.
Since the sights and extractor remain attached to the barrel in the Contender design, the frame itself contains no cartridge-specific features. A barrel of another caliber or length can be installed and pinned in place, the fore-end replaced, and the pistol is ready to shoot with a different barrel and pre-aligned sights.
Since the cartridge extractor or ejector is built into the barrel assembly in break action weapons, the breech face is simply a flat plate with a hole for the firing pin to protrude through. This makes break actions ideal for interchangeable barrel firearms, such as the popular Thompson/Center Arms Contender and Encore pistols.
Rim lock is where the rim of the shell casing gets caught on the extractor groove of the casing underneath it. It is a common issue for calibers with large rims, such as 7.62×54mmR, or guns that have been rechambered for cartridges shorter than intended without replacing the original magazine with one that compensates for the shorter round.
Remington-Rider Magazine Pistol has a manually-actuated rolling block action to pull a cartridge from a tubular magazine set below the barrel and simultaneously cock the firearm. The block was rolled back into battery, loading the cartridge into the chamber, by spring pressure while the hammer remained in the cocked position.
General purpose machine gun: A machine gun intended to fill the role of either a light machine gun or medium machine gun, while at the same time being man-portable. Grain is a unit of measurement of mass that is based upon the mass of a single seed of a typical cereal. Used in firearms to denote the amount of powder in a cartridge or the weight ...