A method and system for attaching a radio frequency identification (RFID) tag to an ordinance is provided. By tailoring the packaged tag and electronics to accommodate existing ordinance body cavities the integrity of the bomb casing is maintained. Likewise, fin assemblies also remain intact and are mounted in a conventional manner to the tagged ordinance. Numerous ordinance types, to include the mark (MK) 80 series general purpose bombs and equivalents are compatible with the tagging method and system described herein. Set screw mounted tail assemblies of various fin configurations are readily assembled onto the metal body casings of tagged ordinances. A curved dipole antenna provides access to external query signals and transmission of tag locating signals. As described herein, tag antennas can mount between ordinance assembly parts, adding to the ease of retrofitting existing ordinance inventory for a RFID tag localizing system.