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Vaughn
At $100 hard to go wrong. Looks more like a Telrad rather than a laser I think?
With the mirror if it is just dust, a simple rinse with water then with demineralised water will get most of it off.
Coatings on mirrors are actually quite robust, but still take care. If it is old the coating may not be very good in which case washing may damage the reflective surface.
Malcolm
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