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The 12"/50 caliber gun Mark 8 was a US naval gun mounted on the Alaska-class cruiser. The gun, like the "large cruiser" that mounted it, was intended to fill the gap between US "heavy cruisers" (6-8") and US battleships (14-16"). The name describes the size of the shells, 12 inches in diameter, and the length of the bore in calibers (50 bore ...
The Mark 12 5"/38-caliber gun was a United States dual-purpose naval gun, but also installed in single-purpose mounts on a handful of ships.The 38-caliber barrel was a mid-length compromise between the previous United States standard 5"/51 low-angle gun and 5"/25 anti-aircraft gun.
The 12-inch (305 mm)/50 caliber Mark 7 naval gun was only a slight improvement over the preceding American naval gun, the 12"/45 caliber Mark 5 gun.As such, it was a very similar weapon, having been lengthened by five calibers to allow for improved muzzle velocity, range, and penetrating power.
BL 6 inch Mk XII naval gun, a British naval gun; MK-3-12 (1907), a Russian naval main weapon that used three 12-inch guns in a single mounting; Mark 12 torpedo (1930), an American 21-inch torpedo; 5"/38 caliber gun or Mark 12 5"/38 (1934), a widely used American 5-inch naval gun; 18 inch Mark XII torpedo (1935), a British 18 inch torpedo
4.5 inch Mark 8 naval gun 55-caliber United Kingdom: Cold War - Modern 120 mm (4.7 in) 12 cm/12 short naval gun Japan: World War II 120 mm (4.7 in) Type 3 120 mm 45 caliber naval gun Japan: World War I - World War II 120 mm (4.7 in) 12 cm/45 10th Year Type naval gun Japan: World War II 120 mm (4.7 in) 12 cm 11th Year Type naval gun Japan
There have been a number of 12" guns with 50 caliber length: 12-inch/50-caliber Mark 7 gun, 1910 US naval gun; 12-inch/50-caliber Mark 8 gun, 1939 US naval gun; 12-inch/50-caliber gun (Argentina), probably based on the 1910 US naval gun, used only in the Argentinian Rivadavia-class battleships; BL 12-inch Mk XI – XII naval gun, British naval ...
Centurion Arms manufactures clones of the Mk 12. [20] Troy Industries made a retro Mk 12 for sale in 2017. [21] Oberland Arms released a version of the Mk 12 in 2019. [22] Palmetto State Armory released clones of the Mk 12 Mod 0, Mod 1, and Mod H in 2023 known as the Sabre Mk 12. Precision Reflex Inc unveiled a Mk 12 rifle chambered in .308 ...
The Mark 3, gun Nos. 15–48 and 50–56, was constructed of tube, jacket, and eight hoops. It was found that the early guns suffered from excessive bore erosion, in an attempt to fix this the Navy reduced the propellant charges to reduce the muzzle velocity, because of this the Mark 4, gun Nos. 49, 58–60, 150–154, and 179, was similar to ...