jet pack detail question

Hi there. Could someone please tell me what was used for this part and where I can find one?

It goes on the bottom of the jet pack.

Thanks.

Looks like some sort of small "interrupter switch."

Or it could be a volume control from an amplifier of some sort.

I have one on the bottom of jet pack its turns on my beacon. Its just a button with the head ripped off. looks almost the same as the pic.. It could be a twist type.