I'm not sure if this is the right subsection for this question, mods please move this if it isn't.
Do airlines normally supply your headset, or do pilots purchase their own? I discovered that there are no adapters for my military Bose noise cancelling headset (non-6 pin, it just has the single plug). I'm considering getting a civilian one, but if they're normally supplied by the company that hires you I'll probably just hold off and use the borrowed aeroclub headset.