Business Insider's Robert Johnson got to take a tour on the USS Barry recently, and of all the amenities and gadgets, what fascinated him the most was the destroyers' 5-inch, 127mm gun -- and the process it took to fire it.
He got got a first hand look at just "what makes the 5-inch weapon tick":
Loaded with an assortment of devastating rounds, the gun can pound out its 20-projectile magazine in about a minute while maintaining pinpoint accuracy via its computerized targeting.
All that happens to make this gun so devastating may surprise you.
Here is look at a few of his photos, but be sure to check them all out here.
As a fun fact, Johnson found out the gunners on the ship have named the weapon Lucile.