Red-i is a unique battery-powered laser bore sight manufactured to specifications of the desired calibre, made out of high-grade brass and stainless steel with a high quality laser, which is aligned and checked 100%. Handgun and shotgun calibres are put directly into the chamber of the weapon and when the trigger is pulled the red laser is fired directly down the barrel onto the target. This extremely high quality laser insert comes with a full 2 year warranty.