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The 3-inch/50-caliber gun (spoken "three-inch fifty-caliber") in United States naval gun terminology indicates the gun fired a projectile 3 inches (76 mm) in diameter, and the barrel was 50 calibers long (barrel length is 3 in × 50 = 150 in or 3.8 m).
The 3-inch gun M5 was an anti-tank gun developed in the United States during World War II. The gun combined a 3-inch (76.2 mm) barrel of the anti-aircraft gun T9 and elements of the 105 mm howitzer M2. The M5 was issued exclusively to the US Army tank destroyer battalions starting in 1943.
The 3-inch round was chosen because it was the smallest caliber ammunition that could be fitted with a VT radar proximity fuze. The twin barrel mount was believed to be more effective against faster aircraft and guided missiles than the single mounted 5"/54 caliber Mark 42 gun, hence, the single barrel version of the Mark 26 never saw service use.
12 inch/50 caliber naval gun United States Argentina: World War I - World War II - Cold War 305 mm (12.0 in) 12"/50 caliber Mark 8 gun United States: World War II - Cold War 317.5 mm (12.50 in) RML 12.5 inch 38 ton gun United Kingdom: 1875 - 1890s 320 mm (13 in) Gonzalez Hontoria de 32 cm mod 1883 Spain: 1883 – 1920s 320 mm (13 in)
The large-caliber guns were designed to fire either an armor-piercing round for anti-ship and anti-structure work, and a high-explosive round for use against unarmored targets and shore bombardment. The North Carolina and South Dakota classes could also fire the 2,700-pound Mark 8 shell with the 16"/45 caliber Mark 6 gun, although with a ...
A 3-inch gun is a gun with a 3-inch bore. Examples include: 3-inch M1902 field gun also M1904, M1905; 3-inch gun M1903 - US coast defense gun, also M1898, M1902 seacoast gun; 3"/50 caliber gun - US dual purpose naval gun; 3"/23 caliber gun - US dual purpose naval gun; QF 3 inch 20 cwt - British anti-aircraft gun; 3-inch Gun M1918 - US anti ...
The Tennessee-class battleships were equipped with 12 14-inch/.50 caliber guns as their primary armament, mounted in four triple-gun turrets. The USS Tennessee (BB-43) was the lead ship of this ...
4.7-inch/50-caliber Mark 1–3 guns (Armstrong) 4-inch/50-caliber Mark 7–10 guns; 4-inch/40-caliber Mark 1–6 guns; 76-mm/62-caliber Mark 75 gun; 3-inch/70-caliber Mark 26 gun; 3-inch/50-caliber Mark 2, 3, 5, 6, 8, 10, 17–22 guns; 3-inch/23-caliber Mark 9, 13, & 14 guns; 3-inch/21-caliber Mark 1 gun (field gun for United States Navy and ...