Sightmark SM39005 Rifle Boresight Red Laser 243/308 Win & 7.62x51mm NATO Brass Chamber Mount

The Sightmark SM39005 is a chamber-mounted red laser boresighter machined from brass to fit rifle chambers in 243 Win, 308 Win, and 7.62x51mm NATO. Drop it into the action like a live cartridge and the projected red laser dot shows exactly where the bore is pointing, allowing fast optic and iron-sight zeroing without firing a shot.

Operating on a visible red laser with a wavelength of 632-650nM, this compact sighting tool runs on the included AG3 battery pack for dependable, repeatable use in the shop or at the range. The brass housing is corrosion-resistant and seats cleanly in the chamber for accurate alignment, while the chamber-mounted design makes it simple to confirm that a scope, red dot, or iron sight is tracking correctly before live fire.

The SM39005 ships complete with the battery pack and a carrying case to keep the boresighter protected between sighting sessions. It is a straightforward, reliable way to speed up scope mounting on hunting, precision, and tactical rifles chambered in 243 Win, 308 Win, or 7.62x51mm NATO.