ARKSight Red BoreSighter for .17 to .78 Calibers Hunting Bore Sight for Rifle Scope and Handgun Sight Red or Green Dot Boresighting Kit with Press Switch Red

Warning: Keep green dot beam away from eyes. Before boresighting your scope, make sure that the firearm is unloaded and the muzzle is pointed in a safe direction. After the sight is adjusted, make sure to remove the sight tool and adapter from the firearm. How to use the Sighting Tool? 1. Assemble the battery into the boresighter. 2. Select the proper adapter that fits in the barrel of your firearm. 3. Install the adapter on the small end of the bore sighting tool. 4. Gently push the small end of the boresighter with the adapter into the barrel of your firearm. Make sure the boresight tool is inserted deeply enough untill it is snug with the crown of your firearm barrel opening. 5. When you turn the light on, a small Red/Green dot will be emitted. And then you can adjust your scope’s windage and elevation so that your crosshair aligns with the red/green dot. Specifications: Material: Aluminum. Length: 7" Big end Diameter: 0.8". Small end Diameter: 0.169". Light Color: Red or Green Max. Output Power: ? 4.9mW. Light class: IIIa. Light wavelength: Red:630nm; Green:532nm. Batteries type: CR2 3V 800mAh, non-rechargeable. Packing List: 1 x Boresighter 12 x Adapters (will fit almost all calibers from .17 to 12ga) 2 x CR2 battery (800mAh each battery) 1 x Screwdriver 1 x Instructions