50 caliber

The 3″/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). Different guns (identified by Mark numbers) of this caliber were used by the U.S. Navy and U.S. Coast Guard from 1890 through the 1990s on a variety of combatant and transport ship classes.
The gun is still in use with the Spanish Navy on Serviola-class patrol boats.

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  1. dsteve

    Several Guns for barrett 50 cal

    I have an ARAK-21 with a 300BLK barrel and 5.56 barrel. Comes with a Santan lower, vortex II red dot, bi-pod and 5 magazines. M1a with an archangel stock, 4 magazines and original Springfield Case. Includes bipod P308 Patriot Ordnance AR10 chambered in 7.62x51, 20 inch barrel, nikon scope...
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