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The change from one barrel to the other may be done by a clockwork type system, where a cam alternates between barrels, or by an inertial system where the recoil of firing the first barrel toggles the trigger to the next barrel. A double-barreled shotgun with an inertial trigger works best with full power shotshells; shooting low recoil ...
Obturation is the necessary barrel blockage or fit in a firearm or airgun created by a deformed soft projectile. [1] A bullet or pellet made of soft material and often with a concave base will flare under the heat and pressure of firing, filling the bore and engaging the barrel's rifling.
The gauge (in American English or more commonly referred to as bore in British English) of a firearm is a unit of measurement used to express the inner diameter (bore diameter) and other necessary parameters to define in general a smoothbore barrel (compare to caliber, which defines a barrel with rifling and its cartridge).
Shot, small and round and delivered without spin, is ballistically inefficient. As the shot leaves the barrel it begins to disperse in the air. The resulting cloud of pellets is known as the shot pattern, or shotgun shot spread. The ideal pattern would be a circle with an even distribution of shot throughout, with a density sufficient to ensure ...
A break action is a type of firearm where the barrel(s) are hinged and can be "broken open" to expose the breech. Multi-barrel break action firearms are usually subdivided into over-and-under or side-by-side configurations for two barrel configurations or "combination gun" when mixed rifle and shotgun barrels are used.
The DoubleTap is distinctive for its two barrels, each carrying a chambered round. It also carries two additional rounds (on a 2-round Bianchi Speed Strip) in the grip which allow for reloading. An ambidextrous thumb latch releases the action but the pistol does not have ejectors; spent rounds must be manually removed if they do not fall free ...
Before the barrel can release the bullet in a consistent manner, it must grip the bullet in a consistent manner. The part of the barrel between where the bullet exits the cartridge, and engages the rifling, is called the "throat", and the length of the throat is the freebore. In some firearms, the freebore is zero as the act of chambering the ...
Gryazev-Shipunov GSh-30-2: KBP Instrument Design Bureau: 30 mm caliber Soviet Union: 1981 GShG-7.62 machine gun: KBP Instrument Design Bureau: 7.62×54mmR Soviet Union: 1968 Hotchkiss Revolving Cannon: Hotchkiss et Cie France: 1872 In-Line: AAI Corporation: 7.62×51mm NATO United States: 1969 M61 Vulcan: General Electric: 20×102mm United ...