USN 5in/25 (12.7 mm) barrels (14pcs) - many USN battleship and cruiser classes in 1920s to 1940s
Used in many USN battleship and cruiser classes in 1920s to 1940s:
Nevada (BB-36), Pennsylvania (BB-38), New Mexico (BB-40), Tennessee (BB-43), Colorado (BB-45), Pensacola (CA-24), Northampton (CA-26), New Orleans (CA-32), Portland (CA-33) and Brooklyn (CL-40) classes
Used also in USN submarines in the 1940s