The Sighting and Cleaning Rest mechanically and optically aligns points of impact and aim. If you can shoot a reasonable group, this is the perfect accessory. Easy to follow instructions. Doubles as a cleaning vise. Fully adjustable for any length gun, precision elevation adjustment, 4 point leveling with an adjustable forend support, welded steel construction with a powder coat finish. Plastic utility tray included. Not for live ammo sighting in of rifles.