We are a French company that provides high-quality outdoor sports equipment and responsive customer service in France. Using high-quality modules with qualified electronic components for longer and constant service life. Suitable for different types of weapons: It is equipped with 5 hole adapters to fit 0.22 to 0.50 calibers and is designed to adjust the aiming of rifles, shotguns, and pistols without firing a single shot. Easy to use: Very simple and easy to use. Simply screw the adapter onto the small end of the tool and insert the tool into the barrel. You only need a few minutes to set the range to zero. [Safety]: Unlike most hole sights, the hole sight must be placed in the muzzle, and the device should remain protruding from the barrel to avoid accidents. Use your cleaning kit for better maintenance. High power laser: used for high visibility IIIA level laser beams, with a maximum output power of less than 1mW. Your satisfactory shopping experience is the most important to us. If you have any questions, please feel free to contact us. Kinzon provides you with perfect and responsive customer service to avoid any losses, so you can purchase with confidence. Our products have English language instructions for English speaking countries and French language instructions for French speaking countries. If you receive an article with an English notification in error, please contact us and we will immediately send you an English notification in PDF format. Note: Laser calibration and zeroing are carried out at the factory. However, you can manually calibrate the zero point of the laser. To achieve this, simply peel off the sticker on the viewfinder head and there are four screw holes. After installing the viewfinder in the barrel, it must be adjusted to zero through these four screw holes, which correspond to the top, bottom, left, and right.