9mm/.38/.22/.223/5.56/.357Mag/.380acp/.17hmr/.177cal/10mm/cal.40S&W Special Laser Boresighter End Barrel Laser Bore Sight with Switch Turn ON/Off, Accurately and Easy to Use

Model: This is a customized laser boresighter for the 9mm/.380acp/.357 special caliber. It is inserted into the barrel directly, (This tool is not available for the barrel with silencer). Easy to use and quickly set your zero.
Switch function: Upgrade the switch function. Easy to turn ON/OFF. No need to remove the batteries frequently. Most of the boresighters on the market cannot turn off the laser.
Advantage: Mini size, high quality gilded craft is very beautiful, and the portable packing boxes easy to carry anywhere. So It is perfect as a gift for a friend or elder. The small brass rod won't damage the barrel.
Spare parts: Comes with 3 sets of batteries and multiple spare O-rings. No worry about the batteries and O Rings replacement issue.
Laser standard: Class IIIa green laser, less than 5mW and wavelength of 520-532nm of green laser. sighting range of 30-300 yards. These basic parameters comply with related application standards.