This is a nicely packaged pointer from a conventional laser manufacturer. In the early '80s, laser pointers were somewhat of a novelty market. This model shows the laser industry seeing it growing. They added a battery and switch to a typical lab he-ne head, making the whole device 19" long! Somewhat unwieldy for a pointer.
Not sure at all about the Aerotech being used on guns.
I searched : Vintage gun scopes HeNe Red
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There’s a laser devices FA-6 hene laser sight on ebay...not cheap though. I have one of the model if tube that goes into it, but not the sight itself though.