Joe Bower got a Vietnam-era US Army Radio Headset in an antiques/surplus store, sealed in the box, for $15. Using a dissected Molex cable and a cheap 2.5mm headset jack, he was able to get the set working with Xbox Live. Now Call of Duty has that extra note of authenticity (especially ’cause there’s extra static on the mic – he has plans to replace that).

US Army Headset – XBox Live mod