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Casemate-mounted 5"/50 caliber gun on the USS North Dakota. A casemate is an armoured structure consisting of a static primary surface incorporating a limited-traverse gun mount: typically, this takes the form of either a gun mounted through a fixed armour plate (typically seen on tank destroyers and assault guns) or a mount consisting of a partial cylinder of armour "sandwiched" between ...
The wall gun or wall piece was a type of smoothbore firearm used in the 16th through 19th centuries by defending forces to break the advance of enemy troops. Essentially, it was a scaled-up version of the army's standard infantry musket , operating under the same principles, but with a bore of up to one-inch (25.4 mm) calibre .
The wall gun was designed to be mounted on a wooden tripod along fortification walls, a design that took hold in the 1400s. ... When shooting a single lead projectile, gun powder would have been ...
A gun rack, also known as a firearm rack, rifle rack, or arm rack, is a rack used for storing firearms such as long guns and handguns. They can be used for regular storage or display. Gun racks are often designed to hold a gun pointing up, with its stock or grip touching the bottom of the rack. Sections on the rack may be intended as slots to ...
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 .
The Third Arm can be used to completely take off the weight of heavy firearms such as the 7.5 kg (17-pound) M249 light machine gun or the 12.5 kg (27.6-pound) M240B general-purpose machine gun from the holder’s arms. [3]
The disappearing gun was a variation on the barbette gun; it consisted of a heavy gun on a carriage that would retract behind a parapet or into a gunpit for reloading. Barbettes were primarily used in coastal defences, but saw some use in a handful of warships, and some inland fortifications. The term is also used for certain aircraft gun mounts.
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