5英寸/54 MK45火炮在七十年代末取代了5英寸/54 MK42火炮,一跃成为目前美国海军主要使用的中等口径火炮,MK45 O型火炮是由FMC公司“北方军械局”制造的,现已在“基德”和“斯普鲁恩斯”级驱逐舰、“塔拉瓦”(通用两栖攻击舰)以及各种水面舰艇上服 The 5-inch / 54-MK45 artillery, which replaced the 5-inch / 54-MK42 artillery at the end of the seventies, became the medium-caliber artillery currently used primarily by the U.S. Navy. The MK45 O-artillery was manufactured by FMC’s North Ordnance Agency and is now In the “Kidd” and “Spruance” class destroyers, “Tarawa” (amphibious assault ships) and a variety of surface ships on the service