The SiteLite SL-500 Ultra Mag Green Laser Boresighter is a top-of-the-line laser sight designed specifically for professionals in the shooting sports industry. With a powerful green laser and a precise target dot reticle, this boresighter is perfect for handgun, shotgun, and rifle enthusiasts looking to improve their accuracy and precision. The barrel mounting system provides a secure and stable attachment, while the battery power source ensures reliable performance during extended shooting sessions. This model is ideal for serious shooters looking to enhance their shooting experience with a high-quality and reliable laser sight. Opened and used once.