March 7, 2024 49th EMS switch from mechanical to electrical fuzes on the MK82 Crew members from the 49th Equipment Maintenance Squadron built a live Mark 82 bomb using the M904 and M905 mechanical fuzes, the last of which are slated to phase out at the end of the year.The M904s and M905s have been in use since the 1970s and are vital to the MK-82 bomb.