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Twin Bren: 7.62×39mm China: 1935 Type 89 machine gun: 7.7×58mm Arisaka Japan: 1929 Type 100 machine gun: 7.92×57mm Japan: 1940 XM214 Microgun: General Electric General Dynamics: 5.56×45mm NATO United States: 1966 Yak-B 12.7mm machine gun: KBP Instrument Design Bureau: 12.7×108mm Soviet Union: 1973
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Holland & Holland double rifle in .375 H&H Magnum.. The double rifle, also known as a double-barreled rifle, is a rifle with two barrels mounted parallel to each other that can be fired simultaneously or sequentially in quick succession.
It is a positively locked breech, gas and recoil operated cannon with a rotating bolt head and a dual-belt selective feed system taking a 25mm NATO cartridge. The rate of fire in burst mode is up to 600 rounds per minute but it can be adjusted electronically and reduced to single shot or a selectable range from 100 up to 175 rounds per minute.
Similarly, doubles are more easily examined to see if loaded than pump-action or semi-automatic shotguns, whose bolt must be opened and chamber closely examined or felt to make sure it is unloaded; with a double gun (or a break-action single gun), whether the gun is loaded, i.e., has cartridges in any chamber, is easily and immediately seen ...
Two ex-USN guns were supplied as spares and designated BL 14-inch gun Mk IV due to the different tube makeup, and two US guns with Asbury roller cams were designated Mark V. [12] In British service it was noted that it took a few shots before the guns warmed up and barrels straightened as the tubes locked together.
The M42 40 mm self-propelled anti-aircraft gun, or "Duster," is an American armored light air-defense gun built for the United States Army from 1952 until December 1960, in service until 1988. Production of this vehicle was performed by the tank division of the General Motors Corporation .
Detail of 30 mm twin AA gun, vz.53/59. The M53/59 Praga is a Czechoslovak self-propelled anti-aircraft gun developed in the late 1950s. It consists of an armoured version of the Praga V3S six-wheel drive truck chassis, armed with a modified version of the M53 twin 30 mm (1.2 in) anti-aircraft gun mounted on the rear, which can be removed and used to provide ground support.