Good product for the price - Sightmark Laser Bore Sights

Works well for an inexpensive bore sight. Best used in shaded area, early morning or late afternoon. Laser becomes difficult to see after approx. twenty-five yards. For those who do not know, this is not to 'zero' in an optic. Rather, it saves you a few rounds for getting close. Do not depend on a bore sighter to dial in your rifle.