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1.Easy-to-use, self-contained boresighting system fits in the chamber of your rifle or pistol and projects a powerful red laser beam aligned with the bore axis for sighting to the point-of-aim without firing a shot.
2.Works with scopes, holographic red dot sights, and variety sights.
3.Durable, machined brass housing looks like a cartridge case but actually contains the entire laser system and batteries.
4.Insert the batteries and screw the cap on the housing to turn on the laser; remove the batteries to turn off.
5.Insert the entire assembly into the chamber, gently close the action, and aim at a target 20-30 yards away.
6.Adjust windage and elevation of the scope or sights so point-of-aim is zeroed on.
Specifications:
1.Range: 1-100 yards
2.Laser Type: Class IIIA Visible Red Laser
3.Laser wavelength: 635-655nm
4.Output power: < 5mW
5.Battery: 3 X LR626
6.Total length: 30mm
http://www.sabretacticalsupply.com/