For more than 30 years, AAMSI has developed, manufactured and repaired Mark XII Diversity systems for the Original Equipment Manufacturers, US Government and approved foreign militaries. AAMSI has full evaluation and repair capability for the KY-532, APX-64, APX-72, APX-76, APX-77, APX-100, APX-101, APX-109, APX110, and APX-121. AAMSI also manufactures the APX-72, APX-77, APX-109, and APX-101. In 2010, AAMSI introduced the AN/APX-121 MK XII IFF Diversity Transponder next-generation, solid state, IFF technology to the market.