Specifications 127caliber (mm) Used by 1945 Shenandoah class support ship AO 11952 Boston class guided-missile cruiser CG 51958 Ayanami class destroyer DD 31958 Impetuoso class destroyer DD 21958 Galveston class guided-missile cruiser CG 11959 Providence class guided-missile cruiser CG 11963 Impavido class guided-missile destroyer DDG 11966 Peder Skram class frigate FF 2 In Service US Navy indonesian navy Japanese Navy Italian Navy Royal Danish Navy
Mark 28 5/38 inch (twin 127mm)
Ayanami class destroyer DD 
Impetuoso class destroyer DD 
Peder Skram class frigate FF 
indonesian navy