6-inch/53-caliber gun

6"/53 caliber naval gun
Forward Mark 16 turret aboard USS Cincinnati (CL-6).
Type	Naval gun
Service history
In service	1920 - 1945
Used by	United States
Wars	World War II
Production history
Variants	Guns Mk 12, Mk 14, Mk 15, Mk 18 Mountings Mk 13, Mk 16, Mk 17
Specifications
Barrel length	26.5 feet (8 m) bore (53 calibers)
Shell	105 pounds (48 kg)[1]
Caliber	152 millimeters (6 in)
Muzzle velocity	900 meters per second (2,950 ft/s)[1]
Maximum firing range	23,130 meters (25,295 yd)[1]

The 6"/53 caliber gun (spoken "six-inch-fifty-three-caliber") formed the main battery of some United States Navy light cruisers and three US submarines built during the 1920s.