Posted in Aviation, Engineering, Government & Military ACMMI stands for Aviation Chief Machinist’s Mate (US Navy rank) ACMMI stands for Australian Collectors of Mechanical Musical Instruments ACMMI Share Pinterest Tweet Whatsapp Post navigation ACMMOACMMC Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.