A 3-inch gun is a
gun
A gun is a ranged weapon designed to use a shooting tube (gun barrel) to launch projectiles. The projectiles are typically solid, but can also be pressurized liquid (e.g. in water guns/cannons, spray guns for painting or pressure washing, p ...
with a 3-inch
bore. Examples include:
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3-inch M1902 field gun
The 3-inch Gun, Model of 1902 was the U.S. Army’s first nickel steel, quick-firing field gun with a recoil mechanism. Like its predecessor the 3.2-inch gun M1897, it was a rifled breechloader.
Design
During the second half of 1890s the so-call ...
also M1904, M1905
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3-inch gun M1903 - US coast defense gun, also M1898, M1902 seacoast gun
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3"/50 caliber gun
The 3"/50 caliber gun (spoken "three-inch fifty-caliber") in United States naval gun terminology indicates the gun fired a projectile in diameter, and the barrel was 50 calibers long (barrel length is 3 in × 50 = ). Different guns (identif ...
- US dual purpose naval gun
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3"/23 caliber gun
The 3"/23 caliber gun (spoken "three-inch-twenty-three-caliber") was the standard anti-aircraft gun for United States destroyers through World War I and the 1920s. United States naval gun terminology indicates the gun fired a projectile 3 inches ...
- US dual purpose naval gun
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QF 3 inch 20 cwt
The QF 3 inch 20 cwt anti-aircraft gun became the standard anti-aircraft gun used in the home defence of the United Kingdom against German airships and bombers and on the Western Front in World War I. It was also common on British warships ...
- British anti-aircraft gun
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3-inch Gun M1918 - US anti-aircraft gun
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3-inch Gun M5 - US anti-tank gun
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76 mm artillery