Long story short, I inherited this gun from a friend in the prop world. Unsure of "Actual Origin" the story goes it was used in a Star Trek Pilot Episode that was never used. I can't say I believe this, but who cares where it came from, it is sweet, and the light works!
It looks like it would have been mounted on a vehicle or tripod, but I had to take a pick "Jessie the Body Style" in my living room. I'm still laughing in the pic from the shock of how cool it is.
Here are a few close ups
This Big gear part says: Cutler-Hammer Motor Control
If anyone has any ideas on where this may be from, that would be interesting.