Instructions &Attention: Your new Cartridge Laser Boresighter is designed for the chamber sizes marked on the bore sighter as well as on the packing box. DO NOT attempt to insert this Boresighter into a different size. Chamber: Doing so may cause damage to the bore sighter and the gun chamber. Specifications: Maximum Output Power: less than 5mW. Target Distance: 20-30 yards Wavelength: 635-655nm.
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