Firefield FF39012 In-Chamber 243/308/7.62x51mm Red Laser Brass Boresighter

The Firefield FF39012 In-Chamber is a brass-bodied laser boresighter built for .243 Winchester, .308 Winchester, and 7.62x51mm NATO rifles. Drop the unit directly into the chamber, close the bolt on your empty firearm, and it projects a sharp red laser dot at the theoretical point of impact - letting you zero scopes and red dots without burning through a box of live ammunition.

The brass housing is machined to the same dimensions as a live cartridge case, so the boresighter self-centers in the bore and stays put while you make adjustments at the range. The laser emits at a 632-650 nm wavelength with a 2 MOA dot at 100 yards, giving you a precise aiming reference for sighting in bolt-action and semi-auto rifles alike. Power comes from a single AG5 button-cell battery rated for approximately 1 hour of continuous run time, and the unit is rated for use in temperatures from 15 to 120 degrees F so it is ready for cold-morning range sessions and warm summer afternoons.

Compact enough to live in a range bag or ammo box, the FF39012 is a fast, no-ammo way to get on paper. Whether you are mounting a new hunting scope, aligning a tactical red dot, or setting up iron sights, this in-chamber boresighter saves time, saves ammo, and gets you shooting sooner.