I have purchased 5 green laser sights from China.  The lasers from China cost about 25% of a "made in USA" equivalent.  Well, the lasers from China burn out quickly, don't work out of the box, don't stay sighted in after shooting, have pressure switches that are quirky, or wear out quickly.  In short they are GARBAGE disguised as JUNK! 

Knowing what I know now, I wished I had purchased an American made laser from the start.  I'd be better off.

Green lasers are pretty cool, but much more harmful to eyesight than similar purpose built red lasers.  Painting aircraft, or other vehicles with a laser could land a person in deep trouble with the Law!  Also you don't dare ship a defective unit back to China, due to export restrictions.

I do not work for any American laser producing company.  I do not own stock in such a company either.