While this looks like a good addition to your Vietnam era loadout, it's still cool to bring this stuff to 21st Century airsoft games. These are military handsets that were modified to fit with FRS radios from Macvairsoft... "Check out these cool handsets and adapters. The hand set is a H-350 model military handset that works with FRS or GMRS radios. It is wired for FRS – GMRS radios with a female 2.5mm microphone connection and a female 3.5mm speaker."