When the unit is in the bore, you can rotate it and the emitted light will actually draw a circle with a diameter of about 1.75 feet on your target at a distance of about 25 yards. This means that the light itself is not centered in the housing. There are no instructions on centering the light.
Pros: Very easy to set up
Cons: Laser is not centered in its housing
This review was written in the old system and had content requirements that are different than reviews written today.