161025-N-AT101-1006 GULF OF MEXICO (Oct. 25, 2016) The pre-commissioning unit John Finn (DDG 113) fires the 5' 62- caliber MK 45 gun during bravo builder's trials. John Finn, built by Huntington Ingalls Shipbuilding, will conduct the final phase of builder's trials, known as the acceptance trial, in early November. (U.S. Navy photo by Petty Officer 1st Class Maddelin Angebrand/Released)