Check the listing for details. Sightmark Universal Boresight with Red Laser SM39014. Condition: New. Listed at 34.97 USD. Sightmark takes boresights seriously because properly sighting in a firearm lays the foundation for success. Our goal is simple: provide the best and most accurate boresights on the market for a variety of calibers. Sightmark proudly offers the largest selection of in-chamber boresights on the market. A Sightmark boresight laser achieves high marks in excellence because the designs do not cut corners. Each boresight is constructed with high quality brass and are calibrated with three set screws in a roller to center the laser diode to the housing. The roller ensures fine adjustments can be made so the boresight is truly centered. This ensures the boresight will accurately project a firearm’s theoretical point of impact, no matter what. Sightmark has created a line of boresights that achieve a reliable, true center, meaning you spend less time, and ammo, at the range trying to find the target with your new rifle. Field tested and approved by the North American Hunting Club, the Sightmark Universal Red Laser Boresight provides the most convenient and accurate method for sighting in rifles and pistols of all types. Simply place the base of the boresight onto the end of the barrel and it will attach magnetically. A laser dot will show exactly where your gun is aiming; it’s easy to sight in any scope without fIring a single shot. Includes a carrying case, three (3) AG3 batteries, and instructions. Laser Wavelength 632 – 650 nm LED Type Visible red laser Output Power