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Thats right , unlike a red laser a green one is closer to the area of the spectrum where ours eyes are more sensitive for the power output of the laser. So you can see the beam .
You can see them as a line that disapears into the sky.
So essentialy there a pointer you follow with your eyes up to end where you are aiming.
They can also be mounted on your scope to use as a finder.
Same idea.
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