Great value product - G-Sight Laser Boresight

These G-Sights are a great value, brass casing and so far accurate, have used rifle and pistol applications without any fail. Have only used in a 100 yardage setting with cloudy skies. I would assume that one would be able to use in sunny skies but may not get as clear of a result. That being said this item is worth it for the intended purpose. I do plan on getting more of these for other applications.