Reduce wasted ammo and keep precision accuracy at your fingertips with this Firefield® Laser Bore Sight. The fastest gun zeroing and sighting system there is, the laser bore sight easily attaches to several rifles including: .308 Winchester, .243 Winchester, 7mm-08 Remington, .260 Remington, and .358 Winchester. Once placed in the chamber of the firearm, the red laser dot appears exactly where the barrel is pointed, allowing the weapon sights to be adjusted to the theoretical impact point. Live fire is only needed to fine tune for bullet drop and windage compensation. Whether used for hunting or target shooting, Firefield® bore sights enhance every adrenaline-filled moment.