Byattoo Universal Laser Bore Sight Kit for Multiple Caliber from .17 to 12GA Rifles and Pistols with Both CR2 and LR44/AG13 Batteries

How to Use ? 1. Install the battery in the boresighter. Confirm the laser can be turned on correctly. 2. Select the proper adapter for your firearm. 3. Twist it into the thread hole of the laser bore's small rob. 4. Tighten and loosen the screw to adjust the adapter size to fit your gun barrel. 5. Tunr on Laser and Insert the small rod with adapter into the gun barrel. Make sure it fit snugly in the barrel. 6. Adjust crosshair to align with the laser dot. 7. Remove the boresighter and adapter from the firearm. 8. Don't forget to test in the range and do the final fine adjustment. Specifications: Material: Aluminum. Laser Color: Red or Green. Laser Wavelength: Red (630-680nm); Green (520nm). Max. Output Power: ≤ 4.5mW. Laser Class: IIIa. Batteries type: CR2 3V 800mAh. Packing include: 1x laser Boresighter 12x Adapters 1x Screwdriver 2 x Batteries set 1x Instruction manual

• ADAPTERS: 12 dapters are colorful, It is much easier to identify than other brands. The Adapters will fit any 0.17 to 12ga handguns, rifles, shotgun, which allows the accurate bore alignment of scopes, iron sights or laser sights on handguns and rifles.
• CAUTION: This tool is not available for the barrel with silencer. Keep the laser beam away from eyes.
• HIGH ACCURACY: We tested every product twice before it is packed, and the upgraded adapters insure the boresighter is much more accurate than others.
• EASY TO USE: Comes with tools, just following the using manual, choosing proper size adapter and insert the laser unit in the muzzle.
• WIDE BATTERY OPTIONS: Upgraded battery compartment design works for bothe CR2 and LR44/AG13 batteries, it is much easier to source the replaced battery.