Sightmark SM39018 Boresight Red Laser .38/.357 Mag Brass

The Sightmark SM39018 is a chambered red laser boresight purpose-built for .38 Special and .357 Magnum revolvers and pistols. Drop the unit into the chamber of your handgun just like a regular cartridge, and it projects a precise red laser dot downrange so you can confirm sight alignment and start dialing in your hits without burning through live ammunition.

Machined from brass for an exact chamber fit in .38 Special and .357 Magnum cylinders and chambers, the SM39018 emits a visible red laser in the 632-650 nm wavelength range. It is sighted for a usable working range of 15 to 100 yards and is rated for operating temperatures from -10 to 50 degrees C, so it works equally well on the bench in the shop and out at the range in cold or warm weather.

Power comes from three (3) AG3 button-cell batteries, which are included right in the box along with a carrying case to protect the brass body and laser diode between sessions. Whether you are zeroing a new set of iron sights or an optic, checking point of aim versus point of impact after a sight swap, or just getting a fresh pistol on paper quickly, this Sightmark boresight is a fast, no-recoil way to get on target.