Ncstar TLZ20G 20 Gauge Shotgun Cartridge Red Laser Boresighter provides a convenient and accurate method for sighting in all Shotguns of all types In 20 Gauge Simply chamber the 20 Gauge Cartridge Laser Boresighter like a regular shell and a laser dot will show exactly where the shotgun is aiming; itís easy to sight in any scope without firing a single shot. Live fire is only needed to fine tune the weapon being sighted in order to compensate for inconsistencies, such as bullet drop due to distance. Perfect for hunters, competitive shooters and law enforcement, Itís easy to use and will quickly save both time and money by avoiding prolonged live fire tests at the range
Fits All 20 Gauge Shotgun Chambers.
Battery Pack For Laser Bore-Sight
Cartridge Length: 2.3"
Laser wavelength, nm 635 - 655
Visible Red Laser
Power, MW < 5
Battery 3x AG3
Battery life about 1-2 hours
Range for sighting, yards 15 - 100
Dot Size 2" at 100 yards
Made of Hard Anodized Aluminum
Temperature, F 14 to 122
( We suggest Extra Batteries Item # AG3 )